Cita APA (7th ed.)
Mager Robert F. (1967). Developing vocational instruction. Pitman.
Cita Chicago (17th ed.)
Mager Robert F. Developing Vocational Instruction. California: Pitman, 1967.
Cita MLA (9th ed.)
Mager Robert F. Developing Vocational Instruction. Pitman, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.