COVEY, S. THE 7 HABITS OF HIGHLY EFFECTIVE TEENS.
Chicago Style aipamenaCOVEY, SEAN. THE 7 HABITS OF HIGHLY EFFECTIVE TEENS.
MLA aipamenaCOVEY, SEAN. THE 7 HABITS OF HIGHLY EFFECTIVE TEENS.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena