APA aipamena

Whittenburg, J. A., & Schumacher, A. W. (1968). An information system planning guide: Preliminary development and checkout. Whittenburg, Vaughn Associates.

Chicago Style aipamena

Whittenburg, John A., and Anne W. Schumacher. An Information System Planning Guide: Preliminary Development and Checkout. Alexandria, Va.: Whittenburg, Vaughn Associates, 1968.

MLA aipamena

Whittenburg, John A., and Anne W. Schumacher. An Information System Planning Guide: Preliminary Development and Checkout. Whittenburg, Vaughn Associates, 1968.