Stummer, A. (2010). Christmas with the Vienna Boys´ Choir: A joyous live holiday performance by the world famous choir. Cobra Entertainment.
Chicago-viite (17. p.)Stummer, Alfons. Christmas with the Vienna Boys´ Choir: A Joyous Live Holiday Performance by the World Famous Choir. Vienna: Cobra Entertainment, 2010.
MLA-viite (9. p.)Stummer, Alfons. Christmas with the Vienna Boys´ Choir: A Joyous Live Holiday Performance by the World Famous Choir. Cobra Entertainment, 2010.
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