APA (7th ed.) Citation

Levey, M. (1966). A room-to-room guide to the National Gallery (2nd [revised] ed.). National Gallery, Publications Department.

Chicago Style (17th ed.) Citation

Levey, Michael. A Room-to-room Guide to the National Gallery. 2nd [revised] ed. London: National Gallery, Publications Department, 1966.

MLA (8th ed.) Citation

Levey, Michael. A Room-to-room Guide to the National Gallery. 2nd [revised] ed. National Gallery, Publications Department, 1966.

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