FISHER, J. E. (1994). Telephone skill at work. Business One Irwin.
Chicago Style aipamenaFISHER, Judith E. Telephone Skill at Work. Burr Ridge: Business One Irwin, 1994.
MLA aipamenaFISHER, Judith E. Telephone Skill at Work. Business One Irwin, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.