Παραπομπή APA

Graaff, J. V. (1979). Theoretical welfare economics. Vikas.

Παραπομπή Chicago Style

Graaff, J. V. Theoretical Welfare Economics. New Delhi: Vikas, 1979.

Παραπομπή MLA

Graaff, J. V. Theoretical Welfare Economics. Vikas, 1979.