APA (7e ed.) Bronvermelding

Wagner, G. (1940). Letter in German to Paul Heuduck, February 12, 1940. Saint Louis University Libraries Digitization Center.

Chicago (17e ed.) Bronvermelding

Wagner, Gerdt. Letter in German to Paul Heuduck, February 12, 1940. Saint Louis University Libraries Digitization Center, 1940.

MLA (8e ed.) Bronvermelding

Wagner, Gerdt. Letter in German to Paul Heuduck, February 12, 1940. Saint Louis University Libraries Digitization Center, 1940.

Let op: Deze citaties zijn niet altijd 100% accuraat.