Cita APA (7a ed.)

Schwertberger, G. (1979). Happy Piano: Pop Sound Introduction. Doblinger.

Cita Chicago Style (17a ed.)

Schwertberger, Gerald. Happy Piano: Pop Sound Introduction. Wien: Doblinger, 1979.

Cita MLA (8a ed.)

Schwertberger, Gerald. Happy Piano: Pop Sound Introduction. Doblinger, 1979.