Cita APA (7a ed.)

U. S. Land Office plates (USA). (1932). Geologic map of the Ashland coal field: Montana. U. S. Land Office plates.

Cita Chicago Style (17a ed.)

U. S. Land Office plates (USA). Geologic Map of the Ashland Coal Field: Montana. Montana: U. S. Land Office plates, 1932.

Cita MLA (9a ed.)

U. S. Land Office plates (USA). Geologic Map of the Ashland Coal Field: Montana. U. S. Land Office plates, 1932.