Previously, APA referencing required page numbers (or other location references) only for a direct quotation from another source. However, the Publication Manual of the American Psychological Association (6th ed.) states: To cite a specific part of a source, indicate the page, chapter, figure, table, or equation at the appropriate point in text. Always give page numbers for quotations. (p. 179) When paraphrasing or referring to an idea contained in another work, you are encouraged to provide a page or paragraph number, especially when it would help an interested reader locate the relevant passage in a long or complex text. (p. 171) Therefore, it is best to check with your lecturer as to her/his preferences in this matter.