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
Bure, Gilles De, author
Flammarion , 2000
Buku Referensi
Schoppert, Peter, author
Periplus Editions, 1997
Buku Referensi