APA引文

De Soyza, T. (1985). The economic and marketing environment in the rice and subsidiary food crops sector. s.n.].

Chicago Style (17th ed.) Citation

De Soyza, Tissa. The Economic and Marketing Environment in the Rice and Subsidiary Food Crops Sector. [Colombo?: s.n.], 1985.

MLA引文

De Soyza, Tissa. The Economic and Marketing Environment in the Rice and Subsidiary Food Crops Sector. s.n.], 1985.