PERL, P. (1978). Cactil And Succulents Philip Perl. Time Life Books.
Lua i Stíl Chicago (17ú heag.)PERL, Philip. Cactil And Succulents Philip Perl. Time Life Books, 1978.
Lua MLA (8ú heag.)PERL, Philip. Cactil And Succulents Philip Perl. Time Life Books, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.