Tidman, Paul, author
Wadsworth, 1999
Buku Teks
Hausman, Alan, author
Wadsworth and Cengage Learning, 2013
Buku Teks
edited by Dov M. Gabbay and John Woods
Elsevier, 2004
Buku Referensi
E. Sumaryono, author
Kanisius, 1999
Buku Teks
Cook, Roy T., 1972-,author
Polity, 2013
Buku Teks