Cita APA (7a ed.)

Birney, B. G. (2013). Winter according to Humphrey. Puffin Books.

Cita Chicago Style (17a ed.)

Birney, Betty G. Winter According to Humphrey. New York: Puffin Books, 2013.

Cita MLA (8a ed.)

Birney, Betty G. Winter According to Humphrey. Puffin Books, 2013.

Precaución: Estas citas no son 100% exactas.