Παραπομπή σε μορφή APA (7η εκδ.)

Curtis, K. H. (1957). Correspondence, July 30, 1957 through August 21, 1957. Saint Louis University Libraries Digitization Center.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Curtis, Kennth; Heuduck. Correspondence, July 30, 1957 Through August 21, 1957. Saint Louis University Libraries Digitization Center, 1957.

Παραπομπή σε μορφή MLA (8th εκδ.)

Curtis, Kennth; Heuduck. Correspondence, July 30, 1957 Through August 21, 1957. Saint Louis University Libraries Digitization Center, 1957.