Cita APA (7a ed.)

Berenstain, S., & Berenstain, J. (2012). Nothing ever happens at the South Pole. Harper.

Cita Chicago Style (17a ed.)

Berenstain, Stan, y Jan Berenstain. Nothing Ever Happens at the South Pole. New York, NY: Harper, 2012.

Cita MLA (8a ed.)

Berenstain, Stan, y Jan Berenstain. Nothing Ever Happens at the South Pole. Harper, 2012.