Hilman, A. Douglas, author
Dryden Press , 1986
Buku Teks
Wells, Walter
Kent Publishing Company, 1985
Buku Teks
Frederick, Robert W.
USA Appleton 1947
Buku Teks
Ochs, Geralyn, author
Elsevier , 2013
Buku Teks
Morrison, Robert Thornton, author
Prentice-Hall, 1992
Buku Teks