Cita APA (7a ed.)

Mather, A., & Chapman, K. (1997). Environmental resources (1a ed.). Longman Group Uk Limited.

Cita Chicago Style (17a ed.)

Mather, A.S, y Kalea Chapman. Environmental Resources. 1a ed. Inglaterra: Longman Group Uk Limited, 1997.

Cita MLA (9a ed.)

Mather, A.S, y Kalea Chapman. Environmental Resources. 1a ed. Longman Group Uk Limited, 1997.