@book{30022,
	author = {Smith, H. W.},
	title = {Strategies of social research},
	publisher = {Prentice-Hall},
	year = {c1981.},
	series = {Prentice-Hall methods of social science series},
	address = {Englewood Cliffs, N.J.},
	edition = {2d ed.},
	note = {Includes indexes.}
}