Seminar on Perspective Planning for Agriculture and Agro-Industries in Punjab Punjab Agricultural University, Gupta, T. R., & Singh, A. (1978). Planning for the growth of rural economy of the Punjab: Background papers. Dept. of Economics and Sociology, Punjab Agricultural University.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Seminar on Perspective Planning for Agriculture and Agro-Industries in Punjab Punjab Agricultural University, Tirath R. Gupta, و Achal Singh. Planning for the Growth of Rural Economy of the Punjab: Background Papers. Ludhiana: Dept. of Economics and Sociology, Punjab Agricultural University, 1978.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Seminar on Perspective Planning for Agriculture and Agro-Industries in Punjab Punjab Agricultural University, et al. Planning for the Growth of Rural Economy of the Punjab: Background Papers. Dept. of Economics and Sociology, Punjab Agricultural University, 1978.