APA aipamena

Kendrick, J. W. (1961). Productivity trends in the United States. Princeton University Press.

Chicago Style aipamena

Kendrick, John W. Productivity Trends in the United States. Princeton [N.J.]: Princeton University Press, 1961.

MLA aipamena

Kendrick, John W. Productivity Trends in the United States. Princeton University Press, 1961.