Shannon, William V.
The heir apparent : Robert Kennedy and the struggle for power
Macmillan, 1967
 Buku Teks SO
Remnick, David
The bridge : the life and rise of Barack Obama
Vintage Books, 2011
 Buku Teks SO
Tillich, Paul
The courage to be / Paul Tillich
Nisbet, 1952
 Buku Teks SO
Kunstler, William M.
The Case for courage / by William M. Kunstler
William-Morrow, 1962
 Buku Teks
Kennedy, John F. [John Fitzgerald], 1917-1963
Pribadi-pribadi jang berani: (profiles in courage) / John F. Kennedy
Endang, 1956
 Buku Teks SO