Ferguson, Wallace K.
Houghton Mifflin , 1958
Buku Teks
Ferguson, Wallace K.
Sir Isaac Pitman & Sons, [date of publication not identified]
Buku Teks SO
Ferguson, Wallace K.
Houghton Miffiln, 1942
Buku Klasik
Naidis, Mark
Dryden Press, 1972
Buku Teks SO
Webster, Hutton
D.C. Heath, 1947
Buku Teks SO