University Press. 1986. ISBN 978-0-253-20378-6. Giles, Peter. The Countertenor. Muller Publishing. 1982. Giles, Peter. A Basic Countertenor Method. London: Kahn
[2019-01-24]. ISBN 978-0-521-78153-4. (原始内容存档于2021-08-28). Muller, George & Kirk, Robert. Muller & Kirk's Small Animal Dermatology. Elsevier Health Sciences