Read a citation for an informative essay below. jones, adam. government and justice in ancient rome. los angeles: liberty press, 2011. print. what information is missing from the citation?

the source is not numbered.
the author’s hometown is missing.
the type of source is not noted.
the publishing company is missing.

I believe the answer would be that the source's aren't numbered. 

The source is not numbered.

Explanation:

According to the APA basics rues for citation are:

All citations should be double spaced Indent after the first line of each entry Entries are not numbered If an element is not present, omit it Alphabetize by the first word of the entry If no author is listed, begin with title Enter author's last name followed by first and middle initials List up to seven (7) authors. Eight (8) or more authors, use only the first six (6) and then ellipses (...) with the last author. Italics must be used for book and periodical titles Capitalize ONLY the first word of a title, the first word of a subtitle, and proper nouns in titles of books and articles, no matter how they appear in a database or catalog List the city and state or country (spell out name) of publication. Example: Lexington, KY (because there are cities names Lexington in many states). Use the abbreviations p. or pp. only for multi-page newspaper articles, encyclopedia entries, and chapters or articles in edited books Do not use the abbreviation p. or pp. (or any other abbreviation) for magazine and journal articles Use p. for one page articles, pp. for multiple page articles Dates are in Year, Month Day format (e.g. 1999, December 20) Date is in parenthesis after the author's name (or title if no author is listed) Retrieval dates for online articles or web pages are always listed as Month day, year (e.g. January 20, 2010)  Use (n.d.) if no date is given

This is a compound sentence because it uses fanboys the s stands for since.