Cita APA (7a ed.)

Sprent, J. I., & Sprent, P. (1990). Nitrogen fixing organisms: Pure and applied aspects. Chapman & Hall.

Cita Chicago Style (17a ed.)

Sprent, Janet I., y Peter Sprent. Nitrogen Fixing Organisms: Pure and Applied Aspects. London: Chapman & Hall, 1990.

Cita MLA (8a ed.)

Sprent, Janet I., y Peter Sprent. Nitrogen Fixing Organisms: Pure and Applied Aspects. Chapman & Hall, 1990.