APA-ийн эшлэл(7 дахь хэвлэлт)

Nelson, R. U. (1948). The technique of variation: A study of the instrumental variation from Antonio de Cabezón to Max Reger. University of California Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Nelson, Robert U. The Technique of Variation: A Study of the Instrumental Variation from Antonio De Cabezón to Max Reger. Los Angeles: University of California Press, 1948.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Nelson, Robert U. The Technique of Variation: A Study of the Instrumental Variation from Antonio De Cabezón to Max Reger. University of California Press, 1948.