Ott, Lyman, author
Duxbury Press, 1993
Buku Teks
Carlborg, Frank W.
Scoott, Foresman, 1968
Buku Teks
Mood, Alexander McFarlane, 1913-, author
McGraw-Hill , 1963
Buku Teks
Larsen, Richard J.
Prentice-Hall, 1981
Buku Teks
Larsen, Richard J.
Prentice-Hall, 1996
Buku Teks