@book{20400,
	author = {Rosen, Kenneth H.},
	title = {Discrete mathematics and its applications : with combinatorics and graph theory},
	publisher = {McGraw Hill Education (India) Private Limited},
	year = {2019},
	address = {Uttar Pradesh; India},
	edition = {7th ed.},
	note = {Indian adaptation by Kamala Kritthivasan}
}