APA (7th ed.) Citation
Knowles, R. S. (1980). <The> Greatest gamblers: <the> epic of American oil exploration (2. ed., 2.print.). University of Oklahoma Press.
Chicago Style (17th ed.) Citation
Knowles, Ruth Sheldon. <The> Greatest Gamblers: <the> Epic of American Oil Exploration. 2. ed., 2.print. Norman: University of Oklahoma Press, 1980.
MLA (9th ed.) Citation
Knowles, Ruth Sheldon. <The> Greatest Gamblers: <the> Epic of American Oil Exploration. 2. ed., 2.print. University of Oklahoma Press, 1980.
Warning: These citations may not always be 100% accurate.