APA aipamena

Mason, R. S. (1989). Robert Giffen and the Giffen paradox. Philip Allan.

Chicago Style aipamena

Mason, Roger S. Robert Giffen and the Giffen Paradox. Oxford: Philip Allan, 1989.

MLA aipamena

Mason, Roger S. Robert Giffen and the Giffen Paradox. Philip Allan, 1989.