Cita APA (7th ed.)

GEYL, P. (1949). Napoleon; for and against. Penguin.

Cita Chicago (17th ed.)

GEYL, Pieter. Napoleon; for and Against. Harmondsworth, Middlesex: Penguin, 1949.

Cita MLA (9th ed.)

GEYL, Pieter. Napoleon; for and Against. Penguin, 1949.