APA (7e ed.) Bronvermelding

Pashin, J. C. (1991). Regional analysis of the Black Creek-Cobb coalbed-methane target interval, Black Warrior basin, Alabama. Geological Survey of Alabama.

Chicago (17e ed.) Bronvermelding

Pashin, Jack C. Regional Analysis of the Black Creek-Cobb Coalbed-methane Target Interval, Black Warrior Basin, Alabama. Tuscaloosa, Ala.: Geological Survey of Alabama, 1991.

MLA (8e ed.) Bronvermelding

Pashin, Jack C. Regional Analysis of the Black Creek-Cobb Coalbed-methane Target Interval, Black Warrior Basin, Alabama. Geological Survey of Alabama, 1991.