Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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