APA (7th ed.) Citation

Geological Survey (U.S.). (1929). Publications of Geological Survey on phosphate rock. [publisher not identified].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Publications of Geological Survey on Phosphate Rock. Washington: [publisher not identified], 1929.

MLA (9th ed.) Citation

Geological Survey (U.S.). Publications of Geological Survey on Phosphate Rock. [publisher not identified], 1929.

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