Pounds, Norman J. G., author
Silver Burdett, 1980
Buku Teks
edited by Otis W. Freeman and John W. Morris
McGraw-Hill, 1958
Buku Teks
edited by Otis W. Freeman and John W. Morris
McGraw-Hill, 1958
Buku Teks
Carlson, Lucile, author
Prentice-Hall, 1960
Buku Teks
Heintzelman, Oliver H., author
Prentice-Hall, 1960
Buku Teks