Fry, R. (2003). Great big book of personal productivity. Viva Books.
シカゴスタイル引用形Fry, Ron. Great Big Book of Personal Productivity. New Delhi: Viva Books, 2003.
MLA引用形式Fry, Ron. Great Big Book of Personal Productivity. Viva Books, 2003.
警告: この引用は必ずしも正確ではありません.