Cita APA (7th ed.)

Kaufman, R. A. (1976). Identifying and solving problems: A system approach. University Associates.

Cita Chicago (17th ed.)

Kaufman, Roger A. Identifying and Solving Problems: A System Approach. La Jolla, Calif.: University Associates, 1976.

Cita MLA (8th ed.)

Kaufman, Roger A. Identifying and Solving Problems: A System Approach. University Associates, 1976.