Sikich, Geary W., author
McGraw-Hill, 1996
Buku Referensi
Kaplan, Laura G., author
McGraw-Hill, 1996
Buku Referensi
Bache, Johnm author
Mosby, 2003
Buku Referensi
Stanway, Andrew, author
Sheldon Press, 1990, 1990
Buku Referensi
Jeffrey R. Ryan, editor
CRC Press, 2009
Buku Teks