Robson, Brian T., author
Methuen, 1973
Buku Teks
Brueckner, Jan K., author
MIT Press, 2011
Buku Teks
Genevieve Giuliano, Susan Hanson, editors
Guilford Press, 2017
Buku Teks
edited by Ronan Paddison
Sage Publications, 2001
Buku Referensi
Bish, Robert L., author
Prentice-Hall, 1974
Buku Teks