Welty, P. T. (1969). Man's Cultural Heritage: A World history (Rev. ed.). J.B. Lippincott.
Chicago Style (17th ed.) ZitazioaWelty, Paul Thomas. Man's Cultural Heritage: A World History. Rev. ed. Philadelphia: J.B. Lippincott, 1969.
MLA (9th ed.) ZitazioaWelty, Paul Thomas. Man's Cultural Heritage: A World History. Rev. ed. J.B. Lippincott, 1969.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.