APA (7th ed.) Citation

Bigelow, D. F. (1922). Rumanian petroleum industry in 1921. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Bigelow, Donald F. Rumanian Petroleum Industry in 1921. [Washington?]: U.S. Government Printing Office, 1922.

MLA (9th ed.) Citation

Bigelow, Donald F. Rumanian Petroleum Industry in 1921. U.S. Government Printing Office, 1922.

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