APA استشهاد

Sheffield, R. (1980). Floating drilling: :equipment and its use. Gulf publishing.

استشهاد بنمط شيكاغو

Sheffield, Riley. Floating Drilling: :equipment and Its Use. London: Gulf publishing, 1980.

MLA استشهاد

Sheffield, Riley. Floating Drilling: :equipment and Its Use. Gulf publishing, 1980.