Andrews, Gavin J., 1970-
Routledge, Taylor & Francis Group, 2018
Buku Teks
Wilson, Holly Skodol
Addison-Wesley, 1985
Buku Teks
Best, John W.
Pearson, 2014
Buku Teks
Best, John W.
Prentice Hall of India, 1982
Buku Teks
Estolas, Josefina V.
Miranda, 1973
Buku Teks