APA引文

Eastman, N., & Hellman, L. M. (1961). Williams Obstetrics.

Chicago Style (17th ed.) Citation

Eastman, Nicholson, and Louis M. Hellman. Williams Obstetrics. 1961.

MLA引文

Eastman, Nicholson, and Louis M. Hellman. Williams Obstetrics. 1961.

警告：這些引文格式不一定是100％准確.