Cita APA (7a ed.)

Hake, C. M., & Nielsen, S. (2006). Letter perfect (Unabridged.). Recorded Books Inc..

Cita Chicago Style (17a ed.)

Hake, Cathy Marie, y Stina Nielsen. Letter Perfect. Unabridged. Prince Frederick: Recorded Books Inc., 2006.

Cita MLA (8a ed.)

Hake, Cathy Marie, y Stina Nielsen. Letter Perfect. Unabridged. Recorded Books Inc., 2006.

Precaución: Estas citas no son 100% exactas.