Kenyon, Anne E.
Prentice-Hall, 1969
Buku Teks
Wheeler, Ruric E., author
Brooks/Cole, 1967
Buku Teks
Wheeler, Ruric E., author
Brooks/Cole, 1970
Buku Teks
Wheeler, Ruric E., author
Brook/Cole, 1969
Buku Teks
Keedy, Mervin J., author
Addison-Wesley , 1969
Buku Teks