Παραπομπή APA

Herrlich, H., & Strecker, G. E. (1973). Category theory: An introduction. Allyn and Bacon.

Παραπομπή Chicago Style

Herrlich, Horst, και George E. Strecker. Category Theory: An Introduction. Boston: Allyn and Bacon, 1973.

Παραπομπή MLA

Herrlich, Horst, και George E. Strecker. Category Theory: An Introduction. Allyn and Bacon, 1973.