@book{57960,
	author = {Park, Joo-yong},
	title = {문제해결 : 문제를 골칫거리에서 도전거리로 변화시키기 = Problem solving: },
	publisher = {Hakji Branch,},
	year = {2016.},
	series = {Introduction to psychology},
	address = {Seoul:}
}