World Fertilizer Conference Los Angeles, Calif, & Fertilizer Institute. (1988). Proceedings. The Fertilizer Institute.
Lua i Stíl Chicago (17ú heag.)World Fertilizer Conference Los Angeles, Calif, agus Fertilizer Institute. Proceedings. Washington, D.C.: The Fertilizer Institute, 1988.
Lua MLA (8ú heag.)World Fertilizer Conference Los Angeles, Calif, agus Fertilizer Institute. Proceedings. The Fertilizer Institute, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.