Mund, Vernon A., author
Appleton-Century-Crofts, 1971
Buku Teks
Lehner, Robert N., author
Prentice-Hall, 1982
Buku Teks
Springer Cham, 2019
eBooks
Massie, Joseph L., author
Prentice-Hall, 1985
Buku Teks
Batty, J
The English Languange Book Society, 1979
Buku Teks