APA (7th ed.) Citation

Langmuir, E. (1994). The national gallery companion guide. National Gallery.

Chicago Style (17th ed.) Citation

Langmuir, Erika. The National Gallery Companion Guide. London: National Gallery, 1994.

MLA (9th ed.) Citation

Langmuir, Erika. The National Gallery Companion Guide. National Gallery, 1994.

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