Cita APA (7a ed.)

National Gallery (Londres), Gombrich, E. H., & Langmuir, E. (1995). Gombrich on shadows. National Gallery.

Cita Chicago Style (17a ed.)

National Gallery (Londres), E. H. Gombrich, y Erika Langmuir. Gombrich on Shadows. London: National Gallery, 1995.

Cita MLA (9a ed.)

National Gallery (Londres), et al. Gombrich on Shadows. National Gallery, 1995.