@book{62205,
	author = {Copi, Irving M.},
	title = {Introduction to logic /},
	publisher = {Prentice Hall,},
	year = {c2002.},
	address = {Upper Saddle River, N.J. :},
	edition = {11th ed.},
	note = {Includes index.},
	url = {http://www.amazon.com/Introduction-Logic-Irving-M-Copi/dp/812032496X/ref=sr_1_1?s=books&ie=UTF8&qid=1419192336&sr=1-1&keywords=812032496x}
}