Friedman S D. (2014). Leading the Life You Want. Harvard Bus. School.
Chicago Style aipamenaFriedman S D. Leading the Life You Want. Boston: Harvard Bus. School, 2014.
MLA aipamenaFriedman S D. Leading the Life You Want. Harvard Bus. School, 2014.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.