@book{1608,
	author = { Marczyk, Geoffrey R.,},
	title = {Essentials of Research Design and Methodology},
	publisher = {John Wiley & Son;},
	year = {2005.},
	address = {Hoboken:},
	url = {https://books.google.com.pk/books?id=IhLlSGyJwcwC&printsec=frontcover&dq=9780471470533&hl=en&sa=X&ved=2ahUKEwiatujM6PH0AhWUlFwKHbecA5cQ6AF6BAgJEAI#v=onepage&q&f=false}
}