Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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

Precaución: Estas citas no son 100% exactas.