Swales, John M., author
The University of Michigan Press, 2004
Buku Teks
Dietsch, Betty Mattix, author
McGraw-Hill, 2003
Buku Teks
Rombauer, Marjorie Dick
West Publishing Company, 1991
Buku Teks
Sundstrom, Ted, author
Pearson-Prentice Hall, 2007
Buku Teks
Levi, Edward H., author
London: The University of Chicago Press, 1949,
Buku Referensi