Joy Hakim, author
Oxford University Press, 2003
Buku Teks
Ritchie, Donald A., author
Macmillan, 1985
Buku Teks
[compiled by] Paul F. Boller, Jr. and Ronald Story
Houghton Mifflin , 1988
Buku Teks
Preston, Andrew, author
Oxford University Press, 2017
eBooks
[compiled by] Paul F. Boller, Jr. and Ronald Story
Hougton Mifflin, 1988
Buku Teks