Cita APA (7th ed.)

Mager, R. F., & Beach, K. M. (1967). Developing vocational instruction. Lear Siegler.

Cita Chicago (17th ed.)

Mager, Robert F., i Kenneth M. Beach. Developing Vocational Instruction. Belmont: Lear Siegler, 1967.

Cita MLA (9th ed.)

Mager, Robert F., i Kenneth M. Beach. Developing Vocational Instruction. Lear Siegler, 1967.