Tohutoro APA (7th ed.)

Koehn, D. (1994). The ground of professional ethics. Routlege.

Tohutoru Kātū Chicago (17th ed.)

Koehn, Daryl. The Ground of Professional Ethics. London ; New York: Routlege, 1994.

Tohutoro MLA (9th ed.)

Koehn, Daryl. The Ground of Professional Ethics. Routlege, 1994.