Stafford, Fiona, author
Wiley Blackwell, 2012
Buku Teks
Dubin, Robert, author
Prentice-Hall, 1974
Buku Teks
Daniel, Robert S.
Hoghton Mifflin, 1965
Buku Teks
Aukerman, Robert C.
John Wiley & Sons, 1981
Buku Teks
Ryu, Je-hun, author
Hollym, 2000
Buku Teks