APA

Salwi (Dilip M), . (1990). 1000 Environment Quiz. : .

Chicago

Salwi (Dilip M), . 1990. 1000 Environment Quiz. : .

Harvard

Salwi (Dilip M), . (1990). 1000 Environment Quiz. : .

MLA

Salwi (Dilip M), . 1000 Environment Quiz. : . 1990.