Tillery, B. W. (1996). Physical science. Iowa: Wm.C.Brown pub.
Chicago Style aipamenaTillery, Bill W. Physical Science. Iowa: Wm.C.Brown pub, 1996.
MLA aipamenaTillery, Bill W. Physical Science. Iowa: Wm.C.Brown pub, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.