APA (7. basım) Alıntı

Unknown. (1931). Letter in German, February 9, 1931. Saint Louis University Libraries Digitization Center.

Chicago Style (17. basım) Atıf

Unknown. Letter in German, February 9, 1931. Saint Louis University Libraries Digitization Center, 1931.

MLA (8th ed.) Atıf

Unknown. Letter in German, February 9, 1931. Saint Louis University Libraries Digitization Center, 1931.

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