SHEAL PETER. (1999). STAFF DEVELOPMENT HANDBOOK (2ND.). KOGAN PAGE.
Chicago Style aipamenaSHEAL PETER. STAFF DEVELOPMENT HANDBOOK. 2ND. LONDON: KOGAN PAGE, 1999.
MLA aipamenaSHEAL PETER. STAFF DEVELOPMENT HANDBOOK. 2ND. KOGAN PAGE, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.