Gaya APA

Beaumont, E, A. (1999). Exploring for oil and gas traps (1999). Tulsa,Oklahoma: American Assocaion of Petrloleum Gelologists.

Gaya MLA

Beaumont, Edward, A. "Exploring for oil and gas traps". 1999 Tulsa,Oklahoma: American Assocaion of Petrloleum Gelologists, 1999. Text.