APA
Butenschon S. . B. H. M., . (1982). Voice and Song. : Cambridge University.
Chicago
Butenschon Sine Borchgrevink Hans M, . 1982. Voice and Song. : Cambridge University.
Harvard
Butenschon S. . B. H. M., . (1982). Voice and Song. : Cambridge University.
MLA
Butenschon Sine Borchgrevink Hans M, . Voice and Song. : Cambridge University. 1982.
