O'Connor, R. (1971). The oil barons: Men of greed and grandeur (3. print.). Little, Brown.
Style de citation Chicago (17e éd.)O'Connor, Richard. The Oil Barons: Men of Greed and Grandeur. 3. print. Boston [u.a.]: Little, Brown, 1971.
Style de citation MLA (8e éd.)O'Connor, Richard. The Oil Barons: Men of Greed and Grandeur. 3. print. Little, Brown, 1971.
Attention : ces citations peuvent ne pas être correctes à 100%.