Carson, Rachel L.
he New American Library, 1956
Buku Teks
Cambridge University Press , 1998
Buku Teks
editor, Susanne Wasum-Rainer, Ingo Winkelmann, Katrin Tiroch
Springer, 2012
eBooks
Gunanto, author
Astoeti Gunanto & Associates, 1988
Buku Teks
Craven, John P., author
Westview Press, 1982
Buku Teks