APA (7th ed.) Citation

Mager, R. F. (1968). Developing attitude toward learning (2nd. ed.). Lake.

Chicago Style (17th ed.) Citation

Mager, Robert F. Developing Attitude Toward Learning. 2nd. ed. Belmont: Lake, 1968.

MLA (9th ed.) Citation

Mager, Robert F. Developing Attitude Toward Learning. 2nd. ed. Lake, 1968.