Null, Gary. Gary Null's power aging / Gary Null. - New York, N.Y., U.S.A. : New American Library, 2003. - xviii, 382 p. ; 23 cm. ISBN: 0451210506 (alk. paper) LCCN: 2003012360 LC Class. No.: RA776.75 / .N838 2003 Dewey Class. No.: 613/.0438