Cita APA (7a ed.)

Perrier, E. (1925). The earth before history: Man's origin and the origin of life. Kegan Paul, Trench, Trubner.

Cita Chicago Style (17a ed.)

Perrier, Edmond. The Earth Before History: Man's Origin and the Origin of Life. Lond: Kegan Paul, Trench, Trubner, 1925.

Cita MLA (8a ed.)

Perrier, Edmond. The Earth Before History: Man's Origin and the Origin of Life. Kegan Paul, Trench, Trubner, 1925.