Wright, Charles Robert, author
Random House, 1975
Buku Teks
Grindstaff, Carl F., author
Christopher Publishing House, 1981
Buku Teks
Roberts, Keith A.
Dorsey Press, 1984
Buku Teks
Wright, Charles Robert, author
Ramaja Karya, 1986
Buku Teks
Jamrozik, Adam, author
Cambridge University Press, 2000
Buku Teks