Schwager, M. (1949). Letter to Paul Heuduck, October 5, 1949. Saint Louis University Libraries Digitization Center.
Chicago Style (17th ed.) CitationSchwager, Mortimer. Letter to Paul Heuduck, October 5, 1949. Saint Louis University Libraries Digitization Center, 1949.
MLA引文Schwager, Mortimer. Letter to Paul Heuduck, October 5, 1949. Saint Louis University Libraries Digitization Center, 1949.
警告:这些引文格式不一定是100%准确.