APA aipamena

(1988). Handbook Business Letters/Roy W. Poe. McGraw-Hill.

Chicago Style aipamena

Handbook Business Letters/Roy W. Poe. McGraw-Hill, 1988.

MLA aipamena

Handbook Business Letters/Roy W. Poe. McGraw-Hill, 1988.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.