Namho, Lee, author
East Bridge, 2005
Buku Teks
Boveri, Margret
G. P. Putnam's Son, 1963
Buku Teks
Ward, A.C.
The English Language Book, 1928
Buku Teks
Gossel, Peter, author
Taschen, 2001
Buku Teks
Findley, Carter V., author
Wadsworth and Cengage Learning, 2011
Buku Teks