APA (7e ed.) Bronvermelding

O'Connor, R. (1971). The oil barons: Men of greed and grandeur (3. print.). Little, Brown.

Chicago (17e ed.) Bronvermelding

O'Connor, Richard. The Oil Barons: Men of Greed and Grandeur. 3. print. Boston [u.a.]: Little, Brown, 1971.

MLA (8e ed.) Bronvermelding

O'Connor, Richard. The Oil Barons: Men of Greed and Grandeur. 3. print. Little, Brown, 1971.