Dyfyniad APA

Shurter, L. R. (1977). Effective Letters in Business (2ed.). Tata Mc graw -hill.

Dyfyniad Arddull Chicago

Shurter, L Robert. Effective Letters in Business. 2ed. New delhi: Tata Mc graw -hill, 1977.

Dyfyniad MLA

Shurter, L Robert. Effective Letters in Business. 2ed. Tata Mc graw -hill, 1977.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.