National Planning Institute. (1991). Prices and marketing policies in agriculture: Cairo : 17 nov- 5 dec- 1991. National Planning Institute.
Cytowanie według stylu Chicago (wyd. 17)National Planning Institute. Prices and Marketing Policies in Agriculture: Cairo : 17 Nov- 5 Dec- 1991. cairo: National Planning Institute, 1991.
Cytowanie według stylu MLA (wyd. 9)National Planning Institute. Prices and Marketing Policies in Agriculture: Cairo : 17 Nov- 5 Dec- 1991. National Planning Institute, 1991.