Παραπομπή APA

Sutermeister, R. A. (1963). People and productivity. Mc graw hill book company.

Παραπομπή Chicago Style

Sutermeister, Robert A. People and Productivity. New York: Mc graw hill book company, 1963.

Παραπομπή MLA

Sutermeister, Robert A. People and Productivity. Mc graw hill book company, 1963.