Chao, Loncoln L.
McGraw-Hill, 1969
Buku Teks
Rossman, Allan J., author
Key College, 2001
Buku Teks
Robert, Harry V., author
McGraw-Hill, 1982
Buku Teks
Brase, Charles Henry.
D.C. Heath, 1991
Buku Teks
Mood, Alexander McFarlane, 1913-, author
McGraw-Hill , 1963
Buku Teks