@book{1230,
	author = {Butler Richard and Butler, Richard J.},
	title = {Sports psychology in performance /},
	publisher = {Butterworth Heinmann.,},
	year = {1997},
	address = {Oxford:},
	note = { Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0604/96051509-d.html}
}