Brinkley, Alan, author
McGraw-Hill, 1997
Buku Referensi
Hicks, John R., author
Houghton Mifflin , 1946
Buku Teks
Todd, Lewis Paul, author
Harcourt, Brace & World, 1961
Buku Teks
Todd, Lewis Paul, author
Harcourt Brace Jovannovich, 1972
Buku Teks
McGraw-Hil, 1994
Buku Teks