APA (7th ed.) Citation

Boardman, J. (1968). Engraved gems: The Ionides collection. Northwestern University Press.

Chicago Style (17th ed.) Citation

Boardman, John. Engraved Gems: The Ionides Collection. Switzerland: Northwestern University Press, 1968.

MLA (9th ed.) Citation

Boardman, John. Engraved Gems: The Ionides Collection. Northwestern University Press, 1968.

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