Mason, R. S. (1989). Robert Giffen and the Giffen paradox. Philip Allan.
Chicago Style (17th ed.) CitationMason, Roger S. Robert Giffen and the Giffen Paradox. Oxford: Philip Allan, 1989.
MLA引文Mason, Roger S. Robert Giffen and the Giffen Paradox. Philip Allan, 1989.
警告:這些引文格式不一定是100%准確.