Cita APA (7th ed.)

Halffter, G. (2011). Biosphere Reserves: Problems and oportunities in México. Instituto de Ecología, A.C.

Cita Chicago (17th ed.)

Halffter, Gonzalo. Biosphere Reserves: Problems and Oportunities in México. Instituto de Ecología, A.C, 2011.

Cita MLA (9th ed.)

Halffter, Gonzalo. Biosphere Reserves: Problems and Oportunities in México. Instituto de Ecología, A.C, 2011.