Cita APA (7a ed.)

Levey, M. (1969). A room-to-room guide to the National Gallery (2rd (rev.) ed.). National Gallery Publications.

Cita Chicago Style (17a ed.)

Levey, Michael. A Room-to-room Guide to the National Gallery. 2rd (rev.) ed. London: National Gallery Publications, 1969.

Cita MLA (9a ed.)

Levey, Michael. A Room-to-room Guide to the National Gallery. 2rd (rev.) ed. National Gallery Publications, 1969.