Παραπομπή APA

Wren, J. (1972). The great battles of World War I. Hamlyn.

Παραπομπή Chicago Style

Wren, Jack. The Great Battles of World War I. London: Hamlyn, 1972.

Παραπομπή MLA

Wren, Jack. The Great Battles of World War I. Hamlyn, 1972.