Cita APA (7a ed.)

Viorst, J. (1967). The changing earth. Bantam Books.

Cita Chicago Style (17a ed.)

Viorst, Judith. The Changing Earth. New York: Bantam Books, 1967.

Cita MLA (8a ed.)

Viorst, Judith. The Changing Earth. Bantam Books, 1967.