APA (7th ed.) Citation

Snowdon, A. A. o. (1972). Assignments: Snowdon. Morrow.

Chicago Style (17th ed.) Citation

Snowdon, Antony Armstrong-Jones of. Assignments: Snowdon. New York: Morrow, 1972.

MLA (9th ed.) Citation

Snowdon, Antony Armstrong-Jones of. Assignments: Snowdon. Morrow, 1972.