@book{481618,
	author = {Couvalis, George, and Sage eBooks},
	title = {The philosophy of science},
	publisher = {SAGE,},
	year = {1997.},
	address = {London :},
	url = {http://ezproxy.alfaisal.edu/login?url=http://sk.sagepub.com/books/the-philosophy-of-science}
}