Cita APA (7a ed.)

Allen, N. K., & Undercuffler, G. (2010). Happy birthday: The story of the world's most popular song. Pelican.

Cita Chicago Style (17a ed.)

Allen, Nancy Kelly, y Gary Undercuffler. Happy Birthday: The Story of the World's Most Popular Song. Gretna, La.: Pelican, 2010.

Cita MLA (8a ed.)

Allen, Nancy Kelly, y Gary Undercuffler. Happy Birthday: The Story of the World's Most Popular Song. Pelican, 2010.

Precaución: Estas citas no son 100% exactas.