@book{31,
	author = {KREY, I. A. and METZLER, B. V. & DRISKA, R. S.},
	title = {Principles and Techniques of Effective Business Communication.},
	publisher = {Harcourt Brace Jovanovich,},
	year = {1968.},
	address = {New York,},
	edition = {2nd Ed.}
}