Cita APA (7th ed.)

Klein, M. F. (1978). About learning materials. Association for Supervision and Curriculum Development.

Cita Chicago (17th ed.)

Klein, M. Frances. About Learning Materials. Washington: Association for Supervision and Curriculum Development, 1978.

Cita MLA (8th ed.)

Klein, M. Frances. About Learning Materials. Association for Supervision and Curriculum Development, 1978.