Zilboorg, G. (1939). I won't apologize: Two letters. Privately Printed.
Citace podle Chicago (17th ed.)Zilboorg, Gregory. I Won't Apologize: Two Letters. New York: Privately Printed, 1939.
Citace podle MLA (8th ed.)Zilboorg, Gregory. I Won't Apologize: Two Letters. Privately Printed, 1939.
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