@book{135538,
	author = {Kotler, Philip,},
	title = {Principles of marketing},
	publisher = {Prentice-Hall},
	year = {c1980.},
	series = {Prentice Hall series in marketing},
	address = {Englewood Cliffs, N.J.},
	edition = {2nd ed.},
	note = {Accompanied by Study Guide.}
}