Sutton, Antony C.
Valiant Publishers, 1977
Buku Teks
Beach, Walter Edwards
Cambridge, Mass., Harvard University Press
Buku Teks SO
selected by a Committee of the American Economic Association
George Allen & Unwin, 1956
Buku Teks
Kurihara, Kenneth K.
W.W. Nortorn, 1950
Buku Teks
Kurihara, Kenneth K.
Allen & Unwin, 1951
Buku Teks