Cravalho, Ernest G., author
Pitman, 1981
Buku Teks
Spalding, D.B., author
The English Language, 1982
Buku Teks
Hsieh, Jui Sheng, 1921-, author
McGraw-Hill Kogakusha, 1975
Buku Teks
Sorensen, Harry A., author
Holt, Rinehart and Winston, 1961
Buku Teks
Ansermet, Jean-Philippe, author
Cambridge University Press, 2019
Buku Teks