APA (7e ed.) Bronvermelding

Schwager, M. (1947). Letter to Arno Heuduck, December 29, 1947. Saint Louis University Libraries Digitization Center.

Chicago (17e ed.) Bronvermelding

Schwager, Mortimer. Letter to Arno Heuduck, December 29, 1947. Saint Louis University Libraries Digitization Center, 1947.

MLA (8e ed.) Bronvermelding

Schwager, Mortimer. Letter to Arno Heuduck, December 29, 1947. Saint Louis University Libraries Digitization Center, 1947.

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