Moh. Ali Aziz, author
Prenada Media, 2004
Buku Teks
Roesel, Catherine E.
McGraw-Hill, 1978
Buku Teks
Walter, Catherine
Cambridge University Press, 1992
Buku Teks
Casey, Catherine
Routledge, 1995
Buku Teks
Niemann, Walter
Tudor Publishing, 1945
Buku Teks