Cita APA (7th ed.)

Leatherman, D. (1990). The training trilogy: Designing programs. HRD.

Cita Chicago (17th ed.)

Leatherman, Dick. The Training Trilogy: Designing Programs. Mass: HRD, 1990.

Cita MLA (9th ed.)

Leatherman, Dick. The Training Trilogy: Designing Programs. HRD, 1990.