Ballou, H. W. (1959). Guide to microreproduction equipment. National Microfilm Association.
Chicago Style aipamenaBallou, Hubbard W. Guide to Microreproduction Equipment. Annapolis, Md: National Microfilm Association, 1959.
MLA aipamenaBallou, Hubbard W. Guide to Microreproduction Equipment. National Microfilm Association, 1959.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.