Belmonte, K. G. (2003). Another burst of prickly color!. IN Succulentophile [column]. Philippine Star.
Lua i Stíl Chicago (17ú heag.)Belmonte, Kevin G. "Another Burst of Prickly Color!. IN Succulentophile [column]." Philippine Star 2003.
Lua MLA (9ú heag.)Belmonte, Kevin G. "Another Burst of Prickly Color!. IN Succulentophile [column]." Philippine Star, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.