Cita APA (7a ed.)

Lankford, M. D., & Dugan, K. (2002). Birthdays around the world. HarperCollins.

Cita Chicago Style (17a ed.)

Lankford, Mary D., y Karen Dugan. Birthdays Around the World. [New York]: HarperCollins, 2002.

Cita MLA (8a ed.)

Lankford, Mary D., y Karen Dugan. Birthdays Around the World. HarperCollins, 2002.

Precaución: Estas citas no son 100% exactas.