Treacy, D. (1993). Successful time management in a week. Hodder & Stoughton.
Chicago Style aipamenaTreacy, Declan. Successful Time Management in a Week. London: Hodder & Stoughton, 1993.
MLA aipamenaTreacy, Declan. Successful Time Management in a Week. Hodder & Stoughton, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.