by Steven L. Spiegel [and others]
Thomson Wadsworth, 2005
Buku Teks
Roskin, Michael G., author
Pearson/Prentice Hall, 2004
Buku Teks
Rourke, John T., author
McGraw-Hill, 2010
Buku Teks
Andrew Hurrell, Ngaire Woods, Satria Utama S., Diana Arimbi
Fakultas Ekonomi UI, 2001
Buku Teks
Blackburn, Glenn, author
St. Martin's, 1985
Buku Teks