Holland, Patricia, author
Routledge, 1997
Buku Referensi
Lenk, John D., author
McGraw-Hill, 1994
Buku Referensi
Dimas Angga Fakhri Muzhoffar, examiner
C.V. Aneka, 1995
Buku Teks
Lenk, John D., author
Prentice-Hall, 1983
Buku Referensi
Zettl, Herbert, author
Cengage Learning, 2015
Buku Teks