APA

Halpern P. G., . (1994). A naval history of World War I. Annapolis, Md: Naval Inst. Press.

Chicago

Halpern Paul G, . 1994. A naval history of World War I. Annapolis, Md: Naval Inst. Press.

Harvard

Halpern P. G., . (1994). A naval history of World War I. Annapolis, Md: Naval Inst. Press.

MLA

Halpern Paul G, . A naval history of World War I. Annapolis, Md: Naval Inst. Press. 1994.