GEBER, S. Z. (1996). How to manage stress for success. Amacom.
Chicago Style aipamenaGEBER, Sara Zeff. How to Manage Stress for Success. New York: Amacom, 1996.
MLA aipamenaGEBER, Sara Zeff. How to Manage Stress for Success. Amacom, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.