APA استشهاد

Nelson, W. (1949). Petroleum Refinery Engineering (4th ed.). McGraw-Hill.

استشهاد بنمط شيكاغو

Nelson, W.L. Petroleum Refinery Engineering. 4th ed. Tokyo: McGraw-Hill, 1949.

MLA استشهاد

Nelson, W.L. Petroleum Refinery Engineering. 4th ed. McGraw-Hill, 1949.