@book{18930,
	author = {Kotler, Philip. and Armstrong, Gary, Jt. auth.},
	title = {Principles of marketing /},
	publisher = {Prentice-Hall of India ,},
	year = {c2006},
	address = {New Delhi :},
	edition = {11th ed. , Indian Reprint ed. , Eastern Econimy ed.}
}