Cita APA (7th ed.)

Ahring, B. K. (2003). Biomethanation. Springer.

Cita Chicago (17th ed.)

Ahring, Birgitte K. Biomethanation. Berlín: Springer, 2003.

Cita MLA (9th ed.)

Ahring, Birgitte K. Biomethanation. Springer, 2003.