diff --git a/schema/plugin.json b/schema/plugin.json
index 5034611..91b8d15 100644
--- a/schema/plugin.json
+++ b/schema/plugin.json
@@ -32,6 +32,13 @@
       "type": "string",
       "default": "apa.csl",
       "description": "The default citation style, one of the styles in the Citation Style Language (CSL) repository."
+    },
+    "outputFormat": {
+      "title": "Format of citations and bibliography",
+      "type": "string",
+      "default": "html",
+      "description": "One of: html, text, rtf, asciidoc, fo, latex",
+      "enum": ["html", "text", "rtf", "asciidoc", "fo", "latex"]
     }
   },
   "additionalProperties": false
diff --git a/src/index.ts b/src/index.ts
index d264a28..3caa58f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -55,6 +55,7 @@ import { UpdateProgress } from './components/progressbar';
 import { Signal } from '@lumino/signaling';
 import { URLExt } from '@jupyterlab/coreutils';
 import { refreshIcon } from '@jupyterlab/ui-components';
+import OutputMode = CiteProc.OutputMode;
 
 const PLUGIN_ID = 'jupyterlab-citation-manager:plugin';
 
@@ -123,6 +124,7 @@ class UnifiedCitationManager implements ICitationManager {
 
   progress: Signal<UnifiedCitationManager, IProgress>;
   private currentAdapter: IDocumentAdapter<any> | null = null;
+  private outputFormat: CiteProc.OutputMode = 'html';
 
   protected createAllReadyPromiseWrapper(): ICancellablePromise<any> {
     const REASON_CANCELLED = 'cancelled';
@@ -326,6 +328,7 @@ class UnifiedCitationManager implements ICitationManager {
 
   protected updateSettings(settings: ISettingRegistry.ISettings) {
     this.defaultStyleID = settings.get('defaultStyle').composite as string;
+    this.outputFormat = settings.get('outputFormat').composite as OutputMode;
   }
 
   public registerReferenceProvider(provider: IReferenceProvider): void {
@@ -650,6 +653,10 @@ class UnifiedCitationManager implements ICitationManager {
           const styleAsText = result.response.responseText;
           return new CSL.Engine(this, styleAsText);
         });
+      })
+      .then((engine: CiteProc.IEngine) => {
+        engine.setOutputFormat(this.outputFormat);
+        return engine;
       });
   }
 
diff --git a/src/types.ts b/src/types.ts
index b5b396d..6edb063 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -69,6 +69,17 @@ export namespace CiteProc {
     string[]
   ];
 
+  /**
+   * https://github.com/Juris-M/citeproc-js/blob/master/src/formats.js
+   */
+  export type OutputMode =
+    | 'html'
+    | 'text'
+    | 'rtf'
+    | 'asciidoc'
+    | 'fo'
+    | 'latex';
+
   /**
    * https://citeproc-js.readthedocs.io/en/latest/running.html
    */
@@ -88,6 +99,8 @@ export namespace CiteProc {
     ): [number, string, CitationID][];
 
     makeBibliography(): Bibliography;
+
+    setOutputFormat(mode: OutputMode): void;
   }
 
   /**