U.S Dep.t of Commerce, 1974
Buku Teks
edited by Nicholas Benwell
Halsted Press, 1975
Buku Teks
Ferrari, Domenico, author
Prentice-Hall, 1978
Buku Teks
Kant, Krishna, author
McGraw-Hill, 1992
Buku Teks
Lizy Kurian John; Lieven Eeckhout
Boca Raton, 2006
Buku Teks