Ohkawa, Kazushi, author
Stanford University Press, 1973
Buku Teks
Rosen, George, author
Free Press, 1958
Buku Teks
edited by Thomas E. Petri ... [et al.].
Westview Press, 1984
Buku Teks
Bryce, Murray D., author
McGraw-Hill, 1960
Buku Teks
Leopold, Richard W., author
Alfred A. Knopf, 1962
Buku Teks