Voisin, A. (1988). Grass productivity. Island Press.
Lua i Stíl Chicago (17ú heag.)Voisin, André. Grass Productivity. Washington, D.C.: Island Press, 1988.
Lua MLA (9ú heag.)Voisin, André. Grass Productivity. Island Press, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.