Fraleigh, John B.
Addison-Wesley Publishing Co., 1994
Buku Teks
McCoy, Neal Henry, author
Allyn and Bacon, 1963
Buku Teks
Narayan, Shanti
S. Chand & Company, 1979
Buku Teks
Spindler, Karlheinz
Marcel Dekker, 1994
Buku Teks
Spindler, Karlheinz
Marcel Dekker, 1994
Buku Teks