Gerken, C. d. (1953). Study your way through school (New, rev. version.). Science Research Associates.
Chicago Style aipamenaGerken, C. d'A. Study Your Way Through School. New, rev. version. Chicago: Science Research Associates, 1953.
MLA aipamenaGerken, C. d'A. Study Your Way Through School. New, rev. version. Science Research Associates, 1953.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.