APA (7th ed.) Citation

Roe, A. S. (1941). A steatite plaque in the Museo Sacro of the Vatican library.

Chicago Style (17th ed.) Citation

Roe, Albert S. A Steatite Plaque in the Museo Sacro of the Vatican Library. 1941.

MLA (9th ed.) Citation

Roe, Albert S. A Steatite Plaque in the Museo Sacro of the Vatican Library. 1941.

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