Dyfyniad APA

Reid, J. M., Jr, & Silleck, A. (1990). Better business letters: A self-instructional book to develop skill in writing (4th ed.). Addison-Wesley Publishing Company, Inc.

Dyfyniad Arddull Chicago

Reid, James M., Jr, and Anne Silleck. Better Business Letters: A Self-instructional Book to Develop Skill in Writing. 4th ed. Reading, Massachusetts: Addison-Wesley Publishing Company, Inc, 1990.

Dyfyniad MLA

Reid, James M., Jr, and Anne Silleck. Better Business Letters: A Self-instructional Book to Develop Skill in Writing. 4th ed. Addison-Wesley Publishing Company, Inc, 1990.

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