ebrary, Inc, & Zhang, W. (2012). Grasslands: Types, biodiversity and impacts. Nova Science Publishers.
Lua i Stíl Chicago (17ú heag.)ebrary, Inc, agus Wen-Jun Zhang. Grasslands: Types, Biodiversity and Impacts. Hauppauge, N.Y.: Nova Science Publishers, 2012.
Lua MLA (9ú heag.)ebrary, Inc, agus Wen-Jun Zhang. Grasslands: Types, Biodiversity and Impacts. Nova Science Publishers, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.