Cita APA (7th ed.)
Birgitte K. Ahring, B. K. A. Biomethanation II. Springer.
Cita Chicago (17th ed.)
Birgitte K. Ahring, B. K. Ahring. Biomethanation II. Berlín, Alemania: Springer.
Cita MLA (9th ed.)
Birgitte K. Ahring, B. K. Ahring. Biomethanation II. Springer.
Atenció: Aquestes cites poden no estar 100% correctes.