APA (7th ed.) Citation

Geological Survey (U.S.). (1921). World atlas of commercial geology. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). World Atlas of Commercial Geology. Washington: [publisher not identified], 1921.

MLA (9th ed.) Citation

Geological Survey (U.S.). World Atlas of Commercial Geology. [publisher not identified], 1921.

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