Strunk Jr., William
Macmillan Publishing Co., 1979
Buku Teks
Epstein, E.L., author
Methuen, 1978
Buku Teks
Gowan, James, author
Distributed in U.S. by St. Martin’s Press, 1994
Buku Teks
Sabino, Catherine, author
Thomes and Hudson, 1986
Buku Referensi
Strunk, William, author
Pearson Education, 2014
Buku Teks