APA
Singh G. (., .The environmental activists handbook. (s.n.), Bombay: .
Chicago
Singh Gayatri (ed), .The environmental activists handbook. (s.n.), Bombay: .
Harvard
Singh G. (., .The environmental activists handbook. (s.n.), Bombay: .
MLA
Singh Gayatri (ed), .(s.n.), Bombay: . .