@book{103693,
	author = {Butrica, Andrew J. and ebrary, Inc.},
	title = {Single stage to orbit},
	publisher = {Johns Hopkins University Press,},
	year = {2003.},
	series = {New series in NASA history},
	address = {Baltimore :},
	url = {https://ezproxy.taylors.edu.my/login?url=http://site.ebrary.com/lib/taylorscollege/Doc?id=10070243}
}