Cita APA (7a ed.)

Oller, C. A., & Blackburn, P. (2011). Teaching sound principles about invalidity.

Cita Chicago Style (17a ed.)

Oller, Carlos Alejandro, y Patrick Blackburn. Teaching Sound Principles About Invalidity. 2011.

Cita MLA (8a ed.)

Oller, Carlos Alejandro, y Patrick Blackburn. Teaching Sound Principles About Invalidity. 2011.