APA
Potter J. t., . (2000). The Cambridge Companion to singing. Cambridge: CUP.
Chicago
Potter John tenor, . 2000. The Cambridge Companion to singing. Cambridge: CUP.
Harvard
Potter J. t., . (2000). The Cambridge Companion to singing. Cambridge: CUP.
MLA
Potter John tenor, . The Cambridge Companion to singing. Cambridge: CUP. 2000.