@book{6115,
	author = { Harris, J. Archer},
	title = { Schaum's Outline of Operating Systems.},
	publisher = { McGraw-Hill,},
	year = {2002.},
	address = {New York :},
	url = {https://books.google.com.pk/books/about/Schaum_s_Outline_of_Operating_Systems.html?id=V1nm8afo9TEC&source=kp_book_description&redir_esc=y}
}