Squire, D. (1994). Cacti & succulents. Tiger Books International.
Lua i Stíl Chicago (17ú heag.)Squire, David. Cacti & Succulents. London: Tiger Books International, 1994.
Lua MLA (9ú heag.)Squire, David. Cacti & Succulents. Tiger Books International, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.