Walk like a giant, sell like a madman / Ralph R. Roberts with John Gallagher. Roberts, Ralph R., 1958- Gallagher, John, 1949- Real estate business United States Marketing. Real estate agents United States. HD1375 .R594 1997 333.33 ROW Includes index. New York : HarperCollins, c1997. c1997. 1997 Text xv, 207 p. ; http://lcweb.loc.gov/catdir/toc/97-8008.html eng United States United States.