APA aipamena

Seidman, L. W. (1989). Productivity: The american advantage. New York: Simon and Schuster.

Chicago Style aipamena

Seidman, L. William. Productivity: The American Advantage. New York: Simon and Schuster, 1989.

MLA aipamena

Seidman, L. William. Productivity: The American Advantage. New York: Simon and Schuster, 1989.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.