Citazione Stile APA (7a Edizione)
Environmental Law Institute & ebrary, Inc. (1999). Protecting Delaware's natural heritage: Tools for biodiversity conservation. Environmental Law Institute.
Citazione stile Chigago Style (17a edizione)
Environmental Law Institute e Inc ebrary. Protecting Delaware's Natural Heritage: Tools for Biodiversity Conservation. Washington, D.C.: Environmental Law Institute, 1999.
Citatione MLA (9a ed.)
Environmental Law Institute e Inc ebrary. Protecting Delaware's Natural Heritage: Tools for Biodiversity Conservation. Environmental Law Institute, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.