Collins, A. H. (1990). Vis revisited. JOAL.
Chicago Style aipamenaCollins, Alice Halpin. Vis Revisited. Oak Lawn, Ill.: JOAL, 1990.
MLA aipamenaCollins, Alice Halpin. Vis Revisited. JOAL, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.