Buchanan, Cathy, author
The Center for Independent Studies, 1992
Buku Teks
Sage Publications, 1998
Buku Teks
Marmo, Marinella, author
Sage, 2016
Buku Teks
Gibbons, Don C., author
Prentice-Hall, 1992
Buku Teks
Fitz-Gibbon, Kate, author
Routledge, 2018
Buku Teks