Indian Council of Agricultural Research. National Bureau of Soil Survey and Land Use Planning. Regional Centre, Delhi. (1981). Soil survey and land use plan of Patiala District, Punjab. National Bureau of Soil Survey and Land Use Planning, Indian Council of Agricultural Research.
Παραπομπή σε μορφή Chicago (17η εκδ.)Indian Council of Agricultural Research. National Bureau of Soil Survey and Land Use Planning. Regional Centre, Delhi. Soil Survey and Land Use Plan of Patiala District, Punjab. Nagpur: National Bureau of Soil Survey and Land Use Planning, Indian Council of Agricultural Research, 1981.
Παραπομπή σε μορφή MLA (8th εκδ.)Indian Council of Agricultural Research. National Bureau of Soil Survey and Land Use Planning. Regional Centre, Delhi. Soil Survey and Land Use Plan of Patiala District, Punjab. National Bureau of Soil Survey and Land Use Planning, Indian Council of Agricultural Research, 1981.