Coffey, Peter
Macmillan, 1974
Buku Teks
Mints, Lloyd W.
McGraw-Hill, 1950
Buku Teks
selected by a Committee of the American Economic Association
George Allen & Unwin, 1956
Buku Teks
Shaw, Edward S.
Richard D. Irwin, 1950
Buku Teks
Kurihara, Kenneth K.
W.W. Nortorn, 1950
Buku Teks