Kendrick, J. W. (1980). Productivity in the United States: Trends and cycles. London: The Johns opkins University Press.
シカゴスタイル引用形Kendrick, John W. Productivity in the United States: Trends and Cycles. London: The Johns opkins University Press, 1980.
MLA引用形式Kendrick, John W. Productivity in the United States: Trends and Cycles. London: The Johns opkins University Press, 1980.
警告: この引用は必ずしも正確ではありません.