Houghton Miffiln, 1996
Buku Teks SO
Houghton Mifflin, 1985
Buku Teks
Easton, Stewart C., author
Holt, Rinehart and Winston, 1966
Buku Teks SO
Kishlansky, Mark
HarperCollins Publishers, 1991
Buku Teks SO
Cunningham, Lawrence S., author
Cengage Learning, 2018
Buku Teks SO