Sweeting, M. M., & Pfeffer, K. (1976). Karst processes. Gebr. Borntraeger.
Lua i Stíl Chicago (17ú heag.)Sweeting, Marjorie Mary, agus Karl-Heinz Pfeffer. Karst Processes. Berlin: Gebr. Borntraeger, 1976.
Lua MLA (8ú heag.)Sweeting, Marjorie Mary, agus Karl-Heinz Pfeffer. Karst Processes. Gebr. Borntraeger, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.