Goldschlager, Les
Prentice-Hall, 1982
Buku Teks
Gear, Charles William, 1935-
McGraw-Hill, 1969
Buku Teks
Wooldridge, Susan
Petrocelli Books, 1974
Buku Teks
Wooldridge, Susan
Petrocelli Books, 1974
Buku Teks
Wooldridge, Susan
Petrocelli Books, 1974
Buku Teks