McGrath, K. A. (1999). World of Scientific Discovery (2nd ed.). Gale.
Chicago Style aipamenaMcGrath, Kimberley A. World of Scientific Discovery. 2nd ed. Detroit: Gale, 1999.
MLA aipamenaMcGrath, Kimberley A. World of Scientific Discovery. 2nd ed. Gale, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.