Radford, Albert E., author
Harper and Row, 1986
Buku Teks
Jones, Samuel B., 1933-, author
McGraw-Hill, 1986
Buku Teks
Jones, Samuel B., 1933-, author
McGraw-Hill, 1979
Buku Teks
Benson, Lyman, author
D.C. Heath , 1957
Buku Teks
Jeffrey, Charles, author
Cambridge University Press, 1982
Buku Teks