^Richard Kitson (1991). "Dwight's Journal of Music"(PDF). Retrospective Index to Musical Periodicals. مؤرشف من الأصل(PDF) في 2016-03-03. اطلع عليه بتاريخ 2011-02-03.
^Introduction, p. ix, Otto Dresel, Collected Vocal Music, ed. David Francis Urrows. Middleton, Wisconsin: A-R Editions, Recent Researches in American Music, v. 45, 2002.