Cita APA (7a ed.)

L'Engle, M. (1981). A swiftly tilting planet. Dell Publishing.

Cita Chicago Style (17a ed.)

L'Engle, Madeleine. A Swiftly Tilting Planet. New York: Dell Publishing, 1981.

Cita MLA (9a ed.)

L'Engle, Madeleine. A Swiftly Tilting Planet. Dell Publishing, 1981.