Mager, R. F. (1962). Preparing instructional objectives. Lear Siegler.
Cita Chicago (17th ed.)Mager, Robert F. Preparing Instructional Objectives. Belmont, Calif: Lear Siegler, 1962.
Cita MLA (9th ed.)Mager, Robert F. Preparing Instructional Objectives. Lear Siegler, 1962.
Atenció: Aquestes cites poden no estar 100% correctes.