Παραπομπή σε μορφή APA (7η εκδ.)

Singh, A. K. (1991). Perspective plan for conservation, management, and development of land resources for Central Zone of India. Giri Institute of Development Studies.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Singh, Ajit Kumar. Perspective Plan for Conservation, Management, and Development of Land Resources for Central Zone of India. Lucknow: Giri Institute of Development Studies, 1991.

Παραπομπή σε μορφή MLA (8th εκδ.)

Singh, Ajit Kumar. Perspective Plan for Conservation, Management, and Development of Land Resources for Central Zone of India. Giri Institute of Development Studies, 1991.