Stein, M. (2003). Newsletters hnadbook. Surjeet Publications.
Chicago Style aipamenaStein, M.L. Newsletters Hnadbook. Delhi: Surjeet Publications, 2003.
MLA aipamenaStein, M.L. Newsletters Hnadbook. Surjeet Publications, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.