Kettelkamp, G. C. (1954). Teaching adolescents. Heath.
Chicago Style aipamenaKettelkamp, Gilbert Clarence. Teaching Adolescents. Boston: Heath, 1954.
MLA aipamenaKettelkamp, Gilbert Clarence. Teaching Adolescents. Heath, 1954.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.