Lutz, Harley Leist, author
D. Appleton-Century, 1947
Buku Teks
Melvin, Michael, author
HarperCollins, 1995
Buku Teks
Nehr, Lee Charles, author
International Textbook, 1967
Buku Teks
Nehr, Lee Charles, author
Intext Educational, 1972
Buku Teks
Baker, James C., author
Prentice-Hall, 1998
Buku Teks