APA引文

Bayles, S. (2007). Laugh and learn about childbirth (New and updated.). Expect This L.L.C..

Chicago Style (17th ed.) Citation

Bayles, Sheri. Laugh and Learn About Childbirth. New and updated. [United States]: Expect This L.L.C., 2007.

MLA引文

Bayles, Sheri. Laugh and Learn About Childbirth. New and updated. Expect This L.L.C., 2007.

警告：這些引文格式不一定是100％准確.