Hubbard, L. Ron. Introduction to scientology ethics / L. Ron Hubbard. - Los Angeles, California : Bridge Publication, c2007. - 513 p. : ill. ; 25 cm. "A Hubbard publication." Includes index. ISBN: 9781403144904 Subjects--Topical Terms: Scientology.Ethics. LC Class. No.: BP605 / .H826 2007