एपीए उद्धरण

Gopalakrishnan, A. (2007). Viswotharakadhakal rashtreeya kolapathakangal. DC Books.

शिकागो स्टाइल उद्धरण

Gopalakrishnan, A.V. Viswotharakadhakal Rashtreeya Kolapathakangal. Kottayam: DC Books, 2007.

एमएलए उद्धरण

Gopalakrishnan, A.V. Viswotharakadhakal Rashtreeya Kolapathakangal. DC Books, 2007.