See M. M. and R. S. Dunn, ed., The Papers of William Penn (5 vol., 1981–87); biographies by W. I. Hull (1937) and M. M. Dunn (1967); A. Pound, The Penns of Pennsylvania and England (1932); E. C. O. Beatty, William Penn as Social Philosopher (1939, repr. 1974); V. Buranelli, The King & the Quaker (1962); M. B. Endy, Jr., William Penn and Early Quakerism (1973).
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