Computer programs stored as documents in Zotero show no date

One of the document types in Zotero is "computer program". I have entered a computer program as an entry in Zotero. However, when I produce the bibliographic entry, using APA style, it does not show a date (n.d. => no date). I have used the "version" field to store a 4-digit date (2004), but even that does not appear as the date. For example,

Smith, R. (n.d.). INTEGRATE.FOR. U.S. Department of Transportation. Retrieved February 20, 2009, .
Sign In or Register to comment.