Cita APA (7a ed.)

Langmuir, E. (2016). The National Gallery companion guide. National Gallery Company.

Cita Chicago Style (17a ed.)

Langmuir, Erika. The National Gallery Companion Guide. London: National Gallery Company, 2016.

Cita MLA (9a ed.)

Langmuir, Erika. The National Gallery Companion Guide. National Gallery Company, 2016.