Shagan, Steve. The circle / Steve Shagan. - New York : William Morrow, 1982. - 419 p. ; 25 cm. "A Perigord Press book." ISBN: 0688011152 LCCN: 82002248 LC Class. No.: PS 3569 .H313 C5 1982 / C5 1982 Dewey Class. No.: 813/.54