Schrag, P. (1974). Test of loyalty: Daniel Ellsberg and the rituals of secret government / Peter Schrag. Simon and Schuster.
Lua i Stíl Chicago (17ú heag.)Schrag, Peter. Test of Loyalty: Daniel Ellsberg and the Rituals of Secret Government / Peter Schrag. New York: Simon and Schuster, 1974.
Lua MLA (8ú heag.)Schrag, Peter. Test of Loyalty: Daniel Ellsberg and the Rituals of Secret Government / Peter Schrag. Simon and Schuster, 1974.
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