Schuman, W. H. (1942). Four canonic choruses for mixed voices a cappella. G. Schirmer.
芝加哥风格引文Schuman, William Howard. Four Canonic Choruses for Mixed Voices a Cappella. New York: G. Schirmer, 1942.
MLA引文Schuman, William Howard. Four Canonic Choruses for Mixed Voices a Cappella. G. Schirmer, 1942.
警告：这些引文格式不一定是100％准确.