Παραπομπή σε μορφή APA (7η εκδ.)

Unknown. American Lyric Tenor and Composer Roland Hayes Performing on the Xavier University of Louisiana Campus.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Unknown. American Lyric Tenor and Composer Roland Hayes Performing on the Xavier University of Louisiana Campus.

Παραπομπή σε μορφή MLA (8th εκδ.)

Unknown. American Lyric Tenor and Composer Roland Hayes Performing on the Xavier University of Louisiana Campus.