Stokes, William Lee, 1915-, author
Prentice-Hall, 1966
Buku Teks
Prothero, Donald R., author
McGraw-Hill, 2010
Buku Teks
Wicander, Reed, author
Brooks/Cole Cengage Learning, 2013
Buku Teks
Monroe, James S. (James Stewart), 1938-, author
Wadsworth, 1997
Buku Teks
Woodford, A.O., author
W.H. Freeman, 1965
Buku Teks