Cita APA (7a ed.)

Waksman, S. A. (1938). Humus: Origin, chemical composition and importance in nature (2nd. ed. rev.). Baillière, Tindall and Cox.

Cita Chicago Style (17a ed.)

Waksman, Selman A. Humus: Origin, Chemical Composition and Importance in Nature. 2nd. ed. rev. London: Baillière, Tindall and Cox, 1938.

Cita MLA (8a ed.)

Waksman, Selman A. Humus: Origin, Chemical Composition and Importance in Nature. 2nd. ed. rev. Baillière, Tindall and Cox, 1938.