APA

Arora P., Arora M., . (1996). Chand's dictionary of environment. New Delhi: S.Chand & Company Ltd.

Chicago

Arora P.N, Arora M.C, . 1996. Chand's dictionary of environment. New Delhi: S.Chand & Company Ltd.

Harvard

Arora P., Arora M., . (1996). Chand's dictionary of environment. New Delhi: S.Chand & Company Ltd.

MLA

Arora P.N, Arora M.C, . Chand's dictionary of environment. New Delhi: S.Chand & Company Ltd. 1996.