Harrison, S. D., & O'Bryan, J. (2014). Teaching singing in the 21st century. Springer.
芝加哥风格引文Harrison, Scott David, 与 Jessica O'Bryan. Teaching Singing in the 21st Century. Dordrecht: Springer, 2014.
MLA引文Harrison, Scott David, 与 Jessica O'Bryan. Teaching Singing in the 21st Century. Springer, 2014.
警告：这些引文格式不一定是100％准确.