TISDALE, S. L. (1975). Soil fertility and fertilizer.-- ed.3. Macmillan Pub.
Lua i Stíl Chicago (17ú heag.)TISDALE, Samuel L. Soil Fertility and Fertilizer.-- Ed.3. New York: Macmillan Pub, 1975.
Lua MLA (9ú heag.)TISDALE, Samuel L. Soil Fertility and Fertilizer.-- Ed.3. Macmillan Pub, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.