Lee, Jong-hee, author
Hawoo, 2010
Buku Referensi
Zelermyer, William
Prentice-Hall, 1960
Buku Teks
Lipshaw, Jeffrey, author
Routledge, 2017
Buku Teks
Brand, Norman, author
St.Martin`s Press, 1976
Buku Teks
Ray, Mary Barnard, author
Thomson West, 2006
Buku Teks