Citazione Stile APA (7a Edizione)

Johnson, N. (1995). Biodiversity in the balance: Approaches to setting graphic conservation priorities. Biodiversity Support Program.

Citazione stile Chigago Style (17a edizione)

Johnson, Nels. Biodiversity in the Balance: Approaches to Setting Graphic Conservation Priorities. Washington, D.C: Biodiversity Support Program, 1995.

Citatione MLA (9a ed.)

Johnson, Nels. Biodiversity in the Balance: Approaches to Setting Graphic Conservation Priorities. Biodiversity Support Program, 1995.