APA引文

Yoakam, G. A., & Simpson, R. G. (1949). Directed study and observation of teaching (rev. ed.). Macmillan.

芝加哥风格引文

Yoakam, Gerald Alan, 与 Robert G. Simpson. Directed Study and Observation of Teaching. rev. ed. New York: Macmillan, 1949.

MLA引文

Yoakam, Gerald Alan, 与 Robert G. Simpson. Directed Study and Observation of Teaching. rev. ed. Macmillan, 1949.