APA format does not give page numbers except for actual quotations, though modified formats do include them for all references. It uses only initials for authors' given names, omits quotation marks, uses minimal capitalization for titles of books and articles, and underlines volume numbers. Here's an example in strict APA format. Ask if your department uses a variation. Other sciences and applied sciences use parenthetical numbers in the text of the paper, matching a numbered list of sources at the end.
Exact formats vary.
Look at copies of journals to see formatting details, including distinctive punctuation, compressed spacing, and lack of underlining or italics. Your professor may ask you to imitate the format used in a specific journal. The system shown here, widely used in the medical sciences, was invented by editors at a meeting in Vancouver. References You CH, Lee KY, Chey RY, Menguy R. Electrogastrographic study of patients with unexplained nausea, bloating and vomiting. Dauphin J, Colomba J. Nausea as symptom in school-entering children.