@book{3566,
	author = {Kostopoulos, George K.,},
	title = {Cyberspace and cybersecurity},
	publisher = {CRC Press,},
	year = {2018.},
	address = {Boca Raton :},
	edition = {2nd ed.},
	url = {https://books.google.com.pk/books?id=TLKwzQEACAAJ&dq=Cyberspace+and+cybersecurity&hl=en&sa=X&redir_esc=y}
}