홈 / 책 찾기 / 판 고르기
판 5개, 최신 판부터
NTC Business Books, 1998, ISBN 9780844232393
Ntc Pub Group, 1993, 무선(페이퍼백), ISBN 9780844233673
NTC Business Books, 1992, ISBN 9780844233666
NTC/Contemporary Publishing Company, 1987, 무선(페이퍼백), ISBN 9780844230672
Crain Books, 1982, ISBN 9780872510722
