Weiss, Edda, author
McGraw-Hill, 1986
Buku Teks
Weiss, Edda, author
McGraw-Hill, 1986
Buku Teks
Saunders, Joy, author
Pearson Education, 1994
Buku Teks
Jones, Randall L., author
New York : Routledge , 2006
Buku Referensi
Donaldson, Bruce, author
Routledge, 2004
Buku Referensi