APA (7th ed.) Citation

Commanday, P. M. (1994). The unannounced classroom visitor. Education Digest, 59(7), 30.

Chicago Style (17th ed.) Citation

Commanday, Peter Martin. "The Unannounced Classroom Visitor." Education Digest 59, no. 7 (1994): 30.

MLA (9th ed.) Citation

Commanday, Peter Martin. "The Unannounced Classroom Visitor." Education Digest, vol. 59, no. 7, 1994, p. 30.