APA (7th ed.) Citation

Bullard, F. M. (1928). Lower Cretaceous of western Oklahoma: A study of the outlying areas of Lower Cretaceous in Oklahoma and adjacent states. [publisher not identified].

Chicago Style (17th ed.) Citation

Bullard, Fred M. Lower Cretaceous of Western Oklahoma: A Study of the Outlying Areas of Lower Cretaceous in Oklahoma and Adjacent States. Norman: [publisher not identified], 1928.

MLA (9th ed.) Citation

Bullard, Fred M. Lower Cretaceous of Western Oklahoma: A Study of the Outlying Areas of Lower Cretaceous in Oklahoma and Adjacent States. [publisher not identified], 1928.