by Robert E. Asher ... [and others]
Brookings Institution, 1962
Buku Teks
Bruton, Henry J.
Prentice-Hall, 1965
Buku Teks
edited by Norman N. Barish and Michel Verhulst
Pergamon Press , 1965
Buku Teks
LP3ES, 1983
Buku Teks
Todaro, Michael P.
Addison-Wesley , 2000
Buku Teks