PN Kalla. (2006). Communication skills for extension workers. Agrotech publishing academy.
シカゴスタイル引用形PN Kalla. Communication Skills for Extension Workers. Udaipur: Agrotech publishing academy, 2006.
MLA引用形式PN Kalla. Communication Skills for Extension Workers. Agrotech publishing academy, 2006.
警告: この引用は必ずしも正確ではありません.