APA (7th ed.) Citation

Betts, J. H. c. 2. J. (1971). Engraved Gems in the Collection of the British School.

Chicago Style (17th ed.) Citation

Betts, John H. ca. 20./21. Jh. Engraved Gems in the Collection of the British School. 1971.

MLA (9th ed.) Citation

Betts, John H. ca. 20./21. Jh. Engraved Gems in the Collection of the British School. 1971.

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