Seidman, L. W. (1989). Productivity: The american advantage. New York: Simon and Schuster.
Trích dẫn kiểu ChicagoSeidman, L. William. Productivity: The American Advantage. New York: Simon and Schuster, 1989.
MLA citiranjeSeidman, L. William. Productivity: The American Advantage. New York: Simon and Schuster, 1989.
Opozorilo: Ti citati niso vedno 100% točni.