Hanson, James A., author
Springer-Verlag, 1971
Buku Teks
Bober, Stanley, author
Wiley Eastern, 1968
Buku Teks
Hoselitz, Bert F., author
Free Press of Glencoe, 1960
Buku Teks
Sherman, Howard J., author
Appleton-Century-Crofts, 1964
Buku Teks
Sherman, Howard J., author
Appleton-Century-Crofts, 1964
Buku Teks