Bransden, Brian H., author
Longman, 1992
Buku Teks
Bransden, Brian H., author
ELBS/Longman, 1990
Buku Teks
Miller, David A.B., author
Cambridge University Press, 2008
Buku Teks
Hanna, Melvin W., author
W.A. Benjamin, 1981
Buku Teks
Blumel, Reinhold, author
Jones and bartlett publishers, 2011
Buku Teks