APA (7th ed.) Citation

Roberts, H. D. W. (1956). Salt Creek, Wyoming: The story of a great oil field. [publisher not identified].

Chicago Style (17th ed.) Citation

Roberts, Harold De Witt. Salt Creek, Wyoming: The Story of a Great Oil Field. Denver: [publisher not identified], 1956.

MLA (9th ed.) Citation

Roberts, Harold De Witt. Salt Creek, Wyoming: The Story of a Great Oil Field. [publisher not identified], 1956.