Παραπομπή APA

National institute of rural development. (1990). Rural development statistics 1989. National institute of rural development.

Παραπομπή Chicago Style

National institute of rural development. Rural Development Statistics 1989. Hyderabad: National institute of rural development, 1990.

Παραπομπή MLA

National institute of rural development. Rural Development Statistics 1989. National institute of rural development, 1990.