@book{6356,
	author = {Marczyk, Geoffrey and DeMatteo, David},
	title = {Essentials of Research Design and Methodology /},
	publisher = {John Wiley & Sons ,},
	year = {2005.},
	address = {New Jersey :},
	url = {https://books.google.com.pk/books?id=IhLlSGyJwcwC&printsec=frontcover&dq=0471470538&hl=en&sa=X&ved=2ahUKEwiIoNT5h9b0AhVTkFwKHQuVBLsQ6wF6BAgGEAE#v=onepage&q&f=false}
}