HARRIS HERBERT. (2000). TWELVE UNIVERSAL LAWS OF SUCCESS. MASTER MIND BOOKS.
Chicago Style aipamenaHARRIS HERBERT. TWELVE UNIVERSAL LAWS OF SUCCESS. BANGALORE: MASTER MIND BOOKS, 2000.
MLA aipamenaHARRIS HERBERT. TWELVE UNIVERSAL LAWS OF SUCCESS. MASTER MIND BOOKS, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.