Pigou, Arthur Cecil, 1877-1959
Macmillan, 1951
Buku Teks
Pigou, Arthur Cecil, 1877-1959
Macmillan, 1956
Buku Teks
Waldo, Dwright
Random House, 1965
Buku Teks
Herber, Bernard P.
Richard D. Irwin, Inc, 1971
Buku Teks
Pritchett, C. Herman
University of North California Press, 1943
Buku Teks