diff --git a/chrome/content/zotero/xpcom/cite.js b/chrome/content/zotero/xpcom/cite.js
index 68db2afede..d9d0c7c727 100644
--- a/chrome/content/zotero/xpcom/cite.js
+++ b/chrome/content/zotero/xpcom/cite.js
@@ -584,13 +584,20 @@ Zotero.Cite.getAbbreviation = new function() {
 
 /**
  * citeproc-js system object
+ *
  * @class
+ * @param {Object} options
+ * @param {Boolean} [options.automaticJournalAbbreviations]
+ * @param {Boolean} [options.uppercaseSubtitles]
  */
-Zotero.Cite.System = function(automaticJournalAbbreviations) {
-	if(automaticJournalAbbreviations) {
+Zotero.Cite.System = function ({ automaticJournalAbbreviations, uppercaseSubtitles }) {
+	if (automaticJournalAbbreviations) {
 		this.getAbbreviation = Zotero.Cite.getAbbreviation;
 	}
-}
+	if (uppercaseSubtitles) {
+		this.uppercase_subtitles = true; // eslint-disable-line camelcase
+	}
+};
 
 Zotero.Cite.System.prototype = {
 	/**
diff --git a/chrome/content/zotero/xpcom/style.js b/chrome/content/zotero/xpcom/style.js
index a65b949eab..88e9e8d81f 100644
--- a/chrome/content/zotero/xpcom/style.js
+++ b/chrome/content/zotero/xpcom/style.js
@@ -648,6 +648,8 @@ Zotero.Style = function (style, path) {
 		Zotero.Styles.ns).replace(/(.+)T([^\+]+)\+?.*/, "$1 $2");
 	this.locale = Zotero.Utilities.xpathText(doc, '/csl:style/@default-locale',
 		Zotero.Styles.ns) || null;
+	var shortID = this.styleID.match(/\/?([^/]+)$/)[1];
+	this._isAPA = /^apa($|-)/.test(shortID);
 	this._class = doc.documentElement.getAttribute("class");
 	this._usesAbbreviation = !!Zotero.Utilities.xpath(doc,
 		'//csl:text[(@variable="container-title" and @form="short") or (@variable="container-title-short")][1]',
@@ -745,7 +747,10 @@ Zotero.Style.prototype.getCiteProc = function(locale, automaticJournalAbbreviati
 	
 	try {
 		var citeproc = new Zotero.CiteProc.CSL.Engine(
-			new Zotero.Cite.System(automaticJournalAbbreviations),
+			new Zotero.Cite.System({
+				automaticJournalAbbreviations,
+				uppercaseSubtitles: this._isAPA
+			}),
 			xml,
 			locale,
 			overrideLocale