Gaya APA

Barham, T, J. (1991). Boy's Changing Voice, The : New Solutions for Today's Choral Teacher . United States of America: Belwin Mills Publishing Corp.

Gaya MLA

Barham, Terry, J.. "Boy's Changing Voice, The : New Solutions for Today's Choral Teacher". United States of America: Belwin Mills Publishing Corp, 1991. Academic.