Cita APA (7a ed.)

Beutner, R. (1938). Life's beginning on the earth. Williams and Wilkins Co.

Cita Chicago Style (17a ed.)

Beutner, Reinhard. Life's Beginning on the Earth. Baltimore: Williams and Wilkins Co, 1938.

Cita MLA (9a ed.)

Beutner, Reinhard. Life's Beginning on the Earth. Williams and Wilkins Co, 1938.