APA引文

Harnack, A. (1957). What is Christianity? Harper & Brothers.

Chicago Style (17th ed.) Citation

Harnack, Adolf. What Is Christianity? New York: Harper & Brothers, 1957.

MLA引文

Harnack, Adolf. What Is Christianity? Harper & Brothers, 1957.

警告：這些引文格式不一定是100％准確.