FOTH, H. D. Dasar-dasar ilmu tanah. Gadjah Mada University Press.
Lua i Stíl Chicago (17ú heag.)FOTH, Henry D. Dasar-dasar Ilmu Tanah. Gadjah Mada University Press.
Lua MLA (8ú heag.)FOTH, Henry D. Dasar-dasar Ilmu Tanah. Gadjah Mada University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.