Thune N. The Behmenists and the Philadelphians: A Contribution to the Study of English Mysticism in the Seventeenth and Eighteenth Centuries. Uppsala, 1948.
Wainwright N. B. The Missing Evidence: Penn vs. Baltimore // PMHB. 1956. Vol. LXXX. P. 227–235.
Weslager C. A. The English on the Delaware, 1610–1682. New Brunswick (N. J.), 1967.
Weslager C. A. The Swedes and Dutch at New Castle: With highlights in the history of the Delaware valley, 1638–1664. New York, 1987.
Wildes H. E. William Penn. New York; London, 1974.
Справочные издания
Костеловский В. Объективное // Философская энциклопедия: В 5 т. / Гл. ред. Ф. В. Константинов. Т. 4. М., 1967. С. 125.
Лекторский В. Субъективное // Философская энциклопедия. Т. 5. М., 1970. С. 156–157.
Dictionary of American History / Ed. J. T. Adams. 2nd
ed. New York, 1942. Vols. I–V.Dictionary of National Biography / L. Stephen and S. Lee, eds. Vols. 1–63. London, 1885–1900.
Waldman C. Encyclopedia of Native American Tribes. 3rd
Ed. New York, 2006.Smith J. R. A descriptive catalogue of friends’ books, or Books written by members of the Society of friends, commonly called quakers, from their rise to the present time… Vols. I–II. London, 1867.
Интернет-ресурсы
Barklay R. An Apology for the True Christian Divinity by Robert Barklay, first published in 1678. 120 East Street Rd., G 304. Warmister, PA 18974 www.qhpress.org 2002.\
http://www.british-history.ac.uk/report.aspx?compid=16802
http://www.digitalhistory.uh.edu/disp_textbook.cfm?smtID=3&psid=4102
http://www.british-history.ac.uk/report.aspx?compid=46829
http://www.nj.gov/state/darm/pdf/proprietors.pdf
http://oll.libertyfund.org/titles/893
http://babel.hathitrust.org/cgi/pt?id=mdp.35112204854709;view=1up;seq=9
https://archive.org/details/nocrossnocrowndi03penn
https://archive.org/details/sandyfoundation00penngoog
http://dqc.esr.earlham.edu:8080/xmlmm/loginB?XMLMMToc=E2177021A-002&XMLMMLanguage=English&XMLMMCollection=/earlham&XMLMMReturnURL=http://www.qhpress.org/cgi-bin/catalog.cgi%3Fname%3Dwilliam.penn
https://archive.org/stream/sandyfoundation00meetgoog#page/n66/mode/2up