APA (7th ed.) Citation

(1956). Catalogue of engraved gems: Greek, Etruscan, and Roman. "L'Erma" di Bretschneider.

Chicago Style (17th ed.) Citation

Catalogue of Engraved Gems: Greek, Etruscan, and Roman. Roma: "L'Erma" di Bretschneider, 1956.

MLA (9th ed.) Citation

Catalogue of Engraved Gems: Greek, Etruscan, and Roman. "L'Erma" di Bretschneider, 1956.

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