APA-viite

Keeble, D. (1975). Micro approach economic and social surfaces Unit 8. The movement of firms. Open University Press.

Chicago-tyylinen lähdeviittaus

Keeble, David. Micro Approach Economic and Social Surfaces Unit 8. The Movement of Firms. England: Open University Press, 1975.

MLA-viite

Keeble, David. Micro Approach Economic and Social Surfaces Unit 8. The Movement of Firms. Open University Press, 1975.