Val, L. (1994). Electronic Media Ethics Val Limburg. Butterworth-Heinemann.
Chicago Style aipamenaVal, Limburg. Electronic Media Ethics Val Limburg. Butterworth-Heinemann, 1994.
MLA aipamenaVal, Limburg. Electronic Media Ethics Val Limburg. Butterworth-Heinemann, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.