APA (7th ed.) Citation

Boardman, J. (1968). Engraved gems : the Ionides collection / John Boardman; photographs by Robert L. Wilkins: The Ionides collection. Thames and Hudson.

Chicago Style (17th ed.) Citation

Boardman, John. Engraved Gems : The Ionides Collection / John Boardman; Photographs by Robert L. Wilkins: The Ionides Collection. London: Thames and Hudson, 1968.

MLA (9th ed.) Citation

Boardman, John. Engraved Gems : The Ionides Collection / John Boardman; Photographs by Robert L. Wilkins: The Ionides Collection. Thames and Hudson, 1968.

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