Khan, H. (1990). Agricultural extension services in six selected villages of NWFP. Institute of Development Studies, N.W.F.P. Agricultural University.
Čikaški stil citiranja (17. izdanje)Khan, Humayun. Agricultural Extension Services in Six Selected Villages of NWFP. Peshawar, Pakistan: Institute of Development Studies, N.W.F.P. Agricultural University, 1990.
MLA način citiranja (8. izdanje)Khan, Humayun. Agricultural Extension Services in Six Selected Villages of NWFP. Institute of Development Studies, N.W.F.P. Agricultural University, 1990.
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