APA Style

Gregory, R, H., L., V, H, R. (1963). Automatic Data - Processing Systems / Robert H. Gregory, and Richard L. Van Horn (2). Belmont, CA.: Wadsworth Publishing Company.

MLA Style

Gregory, Robert, H.., L., Van, Horn,, Richard. "Automatic Data - Processing Systems / Robert H. Gregory, and Richard L. Van Horn". 2 Belmont, CA.: Wadsworth Publishing Company, 1963. Textbook ห้องสมุดทั่วไป.