Cita APA (7a ed.)

Ellis, M., & Ellis, P. (1988). Counterpoint. Intensive. Coursebook 4. Thomas Nelson.

Cita Chicago Style (17a ed.)

Ellis, Mark, y Printha Ellis. Counterpoint. Intensive. Coursebook 4. Hong Kong: Thomas Nelson, 1988.

Cita MLA (9a ed.)

Ellis, Mark, y Printha Ellis. Counterpoint. Intensive. Coursebook 4. Thomas Nelson, 1988.