एपीए उद्धरण

PN Kalla. (2006). Communication skills for extension workers. Agrotech publishing academy.

शिकागो स्टाइल उद्धरण

PN Kalla. Communication Skills for Extension Workers. Udaipur: Agrotech publishing academy, 2006.

एमएलए उद्धरण

PN Kalla. Communication Skills for Extension Workers. Agrotech publishing academy, 2006.