@book{29306,
	author = {Walkenbach, John},
	title = {Microsoft excel 2013},
	publisher = {John Wiley & Sons Publisher},
	year = {2014},
	address = {New Dehli},
	url = {https://libgen.is/book/index.php?md5=D6866AD036E765D17AB3B46B3F588FD7}
}