Shurter, R. L. (1954). Effective letters in business (2nd ed.). Tata McGraw Hill Publishing Co.Ltd.
Chicago Style aipamenaShurter, Robert L. Effective Letters in Business. 2nd ed. Bombay: Tata McGraw Hill Publishing Co.Ltd, 1954.
MLA aipamenaShurter, Robert L. Effective Letters in Business. 2nd ed. Tata McGraw Hill Publishing Co.Ltd, 1954.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.