APA (7th ed.) Citation

Holmes, U. T. J. (1934). Mediaeval gem stones.

Chicago Style (17th ed.) Citation

Holmes, Urban T. Jr. Mediaeval Gem Stones. Cambridge, Mass, 1934.

MLA (9th ed.) Citation

Holmes, Urban T. Jr. Mediaeval Gem Stones. 1934.

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