Cita APA (7th ed.)

Oltmans, W. L. (1974). On growth. Capricorn Books.

Cita Chicago (17th ed.)

Oltmans, Willem L. On Growth. New York: Capricorn Books, 1974.

Cita MLA (9th ed.)

Oltmans, Willem L. On Growth. Capricorn Books, 1974.