APA način citiranja (7. izdanje)
Environmental Law Institute & ebrary, Inc. (1999). Protecting Delaware's natural heritage: Tools for biodiversity conservation. Environmental Law Institute.
Čikaški stil citiranja (17. izdanje)
Environmental Law Institute i Inc ebrary. Protecting Delaware's Natural Heritage: Tools for Biodiversity Conservation. Washington, D.C.: Environmental Law Institute, 1999.
MLA način citiranja (9. izdanje)
Environmental Law Institute i Inc ebrary. Protecting Delaware's Natural Heritage: Tools for Biodiversity Conservation. Environmental Law Institute, 1999.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.