APA (7th ed.) Citation

Geffroy, G., Koechlin, R., & Noël, B. (1911). Les Gobelins. [publisher not identified].

Chicago Style (17th ed.) Citation

Geffroy, Gustave, Raymond Koechlin, and Bernard Noël. Les Gobelins. [Paris]: [publisher not identified], 1911.

MLA (9th ed.) Citation

Geffroy, Gustave, et al. Les Gobelins. [publisher not identified], 1911.