Kallenbach, J. E. (1966). The American Chief Executive: The Presidency and the Governorship. Harper and Row.
Παραπομπή σε μορφή Chicago (17η εκδ.)Kallenbach, Joseph Ernest. The American Chief Executive: The Presidency and the Governorship. New York: Harper and Row, 1966.
Παραπομπή σε μορφή MLA (9th εκδ.)Kallenbach, Joseph Ernest. The American Chief Executive: The Presidency and the Governorship. Harper and Row, 1966.
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