Flesch, Rudolf
Harper & Row Publishers, 1962
Buku Teks
Scharton, Maurice
Allyn and Bacon, 1993
Buku Teks
Little, Brown And Company, 1982
Koleksi Publik
Zinsser, William, author
Harper Collins, 1990
Buku Teks
Zinsser, William, author
A HarperResource Book, 2001
Buku Teks