GEORGE C.S. (1992). SUPERVISION IN ACTION. PRENTICE - HALL.
Chicago Style aipamenaGEORGE C.S. SUPERVISION IN ACTION. LONDON: PRENTICE - HALL, 1992.
MLA aipamenaGEORGE C.S. SUPERVISION IN ACTION. PRENTICE - HALL, 1992.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.