Doe, Norman
Fundamental authority in late medieval English law
Cambridge University Press, 1990
 Buku Teks
Hodges, Luther H.
The business conscience
Prentice-Hall, 1963
 Buku Teks
Burlingame, Roger
The American conscience
Alfred A. Knopf, 1960
 Buku Teks SO
Friedrich, Carl J.
Authority
Harvard University, 1958
 Buku Teks
Sennett, Richard
Authority
Alfred A. Knopf, 1980
 Buku Teks