APA (7th ed.) Citation

Wilhelms, F. T. (1973). Supervision in a new key. Association for Supervision and Curriculum Development.

Chicago Style (17th ed.) Citation

Wilhelms, Fred T. Supervision in a New Key. Washington: Association for Supervision and Curriculum Development, 1973.

MLA (9th ed.) Citation

Wilhelms, Fred T. Supervision in a New Key. Association for Supervision and Curriculum Development, 1973.