Cita APA (7a ed.)

Allen, O. N. (1949). Experiments in soil bacteriology. El autor.

Cita Chicago Style (17a ed.)

Allen, O. N. Experiments in Soil Bacteriology. Minnesota: El autor, 1949.

Cita MLA (8a ed.)

Allen, O. N. Experiments in Soil Bacteriology. El autor, 1949.