Cita APA (7th ed.)

Willis, D. (1989). Teacher's guide to Pearl makers. Friendship Press.

Cita Chicago (17th ed.)

Willis, Doris. Teacher's Guide to Pearl Makers. New York: Friendship Press, 1989.

Cita MLA (9th ed.)

Willis, Doris. Teacher's Guide to Pearl Makers. Friendship Press, 1989.