APA aipamena

Heuduck, P. (1949). Letter to Hildreth Meiere, October 19, 1949. Saint Louis University Libraries Digitization Center.

Chicago Style aipamena

Heuduck, Paul. Letter to Hildreth Meiere, October 19, 1949. Saint Louis University Libraries Digitization Center, 1949.

MLA aipamena

Heuduck, Paul. Letter to Hildreth Meiere, October 19, 1949. Saint Louis University Libraries Digitization Center, 1949.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.