Παραπομπή σε μορφή APA (7η εκδ.)

Usher, M. B. (1973). Biological management and conservation: Ecological theory, application and planning. Chapman and Hall.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Usher, M. B. Biological Management and Conservation: Ecological Theory, Application and Planning. London: Chapman and Hall, 1973.

Παραπομπή σε μορφή MLA (8th εκδ.)

Usher, M. B. Biological Management and Conservation: Ecological Theory, Application and Planning. Chapman and Hall, 1973.