Okai, M. (1999). Social valuation in agricultural policy analysis: Its Significanace for Sub-Saharan Africa. Aldershot: Ashgate.
استشهاد بنمط شيكاغوOkai, Matthew. Social Valuation in Agricultural Policy Analysis: Its Significanace for Sub-Saharan Africa. Aldershot: Ashgate, 1999.
MLA استشهادOkai, Matthew. Social Valuation in Agricultural Policy Analysis: Its Significanace for Sub-Saharan Africa. Aldershot: Ashgate, 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.