APA (7e ed.) Bronvermelding

423378 Birchard, B. (2005). Natures keepers: The remarkable story of how the Nature Conservancy became the largest environmental organization in the world. San Francisco, CA : Jossey-Bass.

Chicago (17e ed.) Bronvermelding

423378 Birchard, Bill. Natures Keepers: The Remarkable Story of How the Nature Conservancy Became the Largest Environmental Organization in the World. San Francisco, CA : Jossey-Bass, 2005.

MLA (9e ed.) Bronvermelding

423378 Birchard, Bill. Natures Keepers: The Remarkable Story of How the Nature Conservancy Became the Largest Environmental Organization in the World. San Francisco, CA : Jossey-Bass, 2005.