Cita APA (7th ed.)

Jackson, E., & Rubio, A. (1967). Spanish made simple. National Book Store.

Cita Chicago (17th ed.)

Jackson, Eugene, i Antonio Rubio. Spanish Made Simple. Manila: National Book Store, 1967.

Cita MLA (9th ed.)

Jackson, Eugene, i Antonio Rubio. Spanish Made Simple. National Book Store, 1967.