Dunn, John, 1940-, author
Routledge, 2009
Buku Referensi
Dunn, John A., 1949-, author
Routledge, 2009
Buku Teks
Frank, Marcella, author
Prentice-Hall, 1972
Buku Teks
Ross, Claudia, author
Routledge, 2006
Buku Referensi
Waard, Hendrik de, author
Addison-Wesley, 1966
Buku Teks