Παραπομπή APA

Graaff, J. V. (1967). Theoretical welfare economics. University Press.

Παραπομπή Chicago Style

Graaff, J.De V. Theoretical Welfare Economics. Cambridge: University Press, 1967.

Παραπομπή MLA

Graaff, J.De V. Theoretical Welfare Economics. University Press, 1967.