Verweij, P. A. (1995). Spatial and temporal modelling of vegetation patterns: Burning and grazing in the paramo of Los Navados National Park, Colombia. Universiteit van Amsterdam.
Lua i Stíl Chicago (17ú heag.)Verweij, Pita Adriana. Spatial and Temporal Modelling of Vegetation Patterns: Burning and Grazing in the Paramo of Los Navados National Park, Colombia. Netherlands: Universiteit van Amsterdam, 1995.
Lua MLA (8ú heag.)Verweij, Pita Adriana. Spatial and Temporal Modelling of Vegetation Patterns: Burning and Grazing in the Paramo of Los Navados National Park, Colombia. Universiteit van Amsterdam, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.