APA

Population Action International, Engelman R. & Cincotta R. P. (2000). Nature's place. Washington: Population Action International.

Chicago

Population Action International, Engelman Robert and Cincotta Richard P. 2000. Nature's place. Washington: Population Action International.

Harvard

Population Action International, Engelman R. and Cincotta R. P. (2000). Nature's place. Washington: Population Action International.

MLA

Population Action International, Engelman Robert and Cincotta Richard P. Nature's place. Washington: Population Action International. 2000.