एपीए उद्धरण

M K Joseph. Vazhithettiya Yathrakkar. DC Books.

शिकागो स्टाइल उद्धरण

M K Joseph. Vazhithettiya Yathrakkar. Kottayam: DC Books.

एमएलए उद्धरण

M K Joseph. Vazhithettiya Yathrakkar. DC Books.