Martin, Judith N.
Experiencing intercultural communication: an introduction
McGraw-Hill, 2001
Buku Teks
Cairncross, Alec
Introduction of economics
Butterworth, 1960
Buku Teks
Johnson, Alvin S.
Introduction to economics
Hearh & Co., 1911
Buku Teks
Morgan, Theodore
Introduction to economics
Prentice-Hall, 1950
Buku Teks
Slavin, Stephen
Introduction to economics
Richard D. Irwin, 1991
Buku Teks