Sharp, W. M., & Olinzock, A. A. (1999). KeyChamp. Cincinnati: South-Western Educational Pub.
Chicago Style aipamenaSharp, Walter M., và Anthony A. Olinzock. KeyChamp. Cincinnati: South-Western Educational Pub, 1999.
MLA aipamenaSharp, Walter M., và Anthony A. Olinzock. KeyChamp. Cincinnati: South-Western Educational Pub, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.