APA (7th ed.) Citation

Hornung, O. (1970). Illustrated encyclopedia of stamp collecting. Hamlyn.

Chicago Style (17th ed.) Citation

Hornung, Otto. Illustrated Encyclopedia of Stamp Collecting. London ; New York: Hamlyn, 1970.

MLA (9th ed.) Citation

Hornung, Otto. Illustrated Encyclopedia of Stamp Collecting. Hamlyn, 1970.

Warning: These citations may not always be 100% accurate.