Singh, Nirmal Business communication : principles, methods and techniques/ by Prof. Nirmal Singh and Gurpreet Kaur. - Delhi Delhi : Deep & Deep Publications (P) Ltd., 2006. - xix,660 p.; 25 cm. Includes index. Includes bibliographical reference PP.648-652. ISBN: 8176297607 Rs.1280.00 Dewey Class. No.: 600