Cita APA (7a ed.)

Hayes, S., & Ormerod, J. (1986). Happy Christmas, Gemma (1st U.S. ed.). Lothrop, Lee & Shepard Books.

Cita Chicago Style (17a ed.)

Hayes, Sarah, y Jan Ormerod. Happy Christmas, Gemma. 1st U.S. ed. New York: Lothrop, Lee & Shepard Books, 1986.

Cita MLA (8a ed.)

Hayes, Sarah, y Jan Ormerod. Happy Christmas, Gemma. 1st U.S. ed. Lothrop, Lee & Shepard Books, 1986.

Precaución: Estas citas no son 100% exactas.