एपीए उद्धरण

M.K.Singh. (2009). Renewable sources of energy. ALP books.

शिकागो स्टाइल उद्धरण

M.K.Singh. Renewable Sources of Energy. New Delhi: ALP books, 2009.

एमएलए उद्धरण

M.K.Singh. Renewable Sources of Energy. ALP books, 2009.