@book{700,
	author = {WALSTAD, W.B. and ROBERT, C. BINGHAM.  & CYRIL, J.GRANT.},
	title = {Study Guide to Company Macroeconomics.},
	publisher = {Mcgraw- Hill  Ryerson Limited,},
	year = {1993.},
	address = {New York,},
	edition = {6th Ed.}
}