Dicht, R. F., & Luthy, A. D. (2005). Coryphantha: Cacti of Mexico and Southern USA. Springer-Verlag.
Lua i Stíl Chicago (17ú heag.)Dicht, Reto F., agus Adrian D. Luthy. Coryphantha: Cacti of Mexico and Southern USA. Berlin, Heidelberg: Springer-Verlag, 2005.
Lua MLA (8ú heag.)Dicht, Reto F., agus Adrian D. Luthy. Coryphantha: Cacti of Mexico and Southern USA. Springer-Verlag, 2005.
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