Benckiser, G., & Schnell, S. (2007). Biodiversity in agricultural production systems. CRC Press/Taylor & Francis Group.
Lua i Stíl Chicago (17ú heag.)Benckiser, Gero, agus Sylvia Schnell. Biodiversity in Agricultural Production Systems. Boca Raton, FL: CRC Press/Taylor & Francis Group, 2007.
Lua MLA (8ú heag.)Benckiser, Gero, agus Sylvia Schnell. Biodiversity in Agricultural Production Systems. CRC Press/Taylor & Francis Group, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.