APA (7e ed.) Bronvermelding

Heuduck, P. (1946). Letter to Mortimer Schwager, July 1, 1946. Saint Louis University Libraries Digitization Center.

Chicago (17e ed.) Bronvermelding

Heuduck, Paul. Letter to Mortimer Schwager, July 1, 1946. Saint Louis University Libraries Digitization Center, 1946.

MLA (8e ed.) Bronvermelding

Heuduck, Paul. Letter to Mortimer Schwager, July 1, 1946. Saint Louis University Libraries Digitization Center, 1946.

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