PERL, P. (1977). Fern Philip Perl. Time-Life Books.
Lua i Stíl Chicago (17ú heag.)PERL, Philip. Fern Philip Perl. Time-Life Books, 1977.
Lua MLA (8ú heag.)PERL, Philip. Fern Philip Perl. Time-Life Books, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.