Cita APA (7a ed.)

Birney, B. G. (2016). Spring according to Humphrey. G.P. Putnam's Sons.

Cita Chicago Style (17a ed.)

Birney, Betty G. Spring According to Humphrey. New York, NY: G.P. Putnam's Sons, 2016.

Cita MLA (8a ed.)

Birney, Betty G. Spring According to Humphrey. G.P. Putnam's Sons, 2016.

Precaución: Estas citas no son 100% exactas.