Potter, Merle C., author
Prentice-Hall, 1978
Buku Teks
Boas, Mary L., author
John Wiley & Sons, 2006
Buku Teks
Boas, Mary L., author
John Wiley & Sons, 1983
Buku Teks
Bartholomew, David J., author
John Wiley & Sons, 1981
Buku Teks
Hayes, Patrick, author
John Wiley & Sons, 1975
Buku Teks