Environmental Law Institute & ebrary, Inc. (1999). Protecting Delaware's natural heritage: Tools for biodiversity conservation. Environmental Law Institute.
Citação do estilo Chicago (17ª ed.)Environmental Law Institute e Inc ebrary. Protecting Delaware's Natural Heritage: Tools for Biodiversity Conservation. Washington, D.C.: Environmental Law Institute, 1999.
Citação MLA (9ª ed.)Environmental Law Institute e Inc ebrary. Protecting Delaware's Natural Heritage: Tools for Biodiversity Conservation. Environmental Law Institute, 1999.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.