Fitzgerald, Gerald B.
A.S.Barnes and Company, 1948
Buku Teks
Rodden, John
[Cambridge University Press;, ], 2012
eBooks
Henry, Nancy
Cambridge University Press, 2008
eBooks
Shinn, George
Gregg Division, McGraw-Hill, 1982
Buku Teks
Hunt, Roberta
Lippincott, 2001
Buku Teks