Παραπομπή APA

Thirkettle, G. (1968). Advanced economics. Macdonald R Evans.

Παραπομπή Chicago Style

Thirkettle, G.L. Advanced Economics. London: Macdonald R Evans, 1968.

Παραπομπή MLA

Thirkettle, G.L. Advanced Economics. Macdonald R Evans, 1968.