Pounds, Norman J. G.
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
Keene, Donald
Tuttle, 1976
Buku Teks
Carlson, Lucile
Prentice-Hall, 1960
Buku Teks