Cita APA (7th ed.)

Avila, D. M., Cruz, M. B. L., & Trajano, M. G. (2003). Essentials of English: Study and thinking skills. Mutya Publ. House.

Cita Chicago (17th ed.)

Avila, Dorcas M., Ma. Beatriz L. Cruz, i Mercedes G. Trajano. Essentials of English: Study and Thinking Skills. Valenzuela City: Mutya Publ. House, 2003.

Cita MLA (9th ed.)

Avila, Dorcas M., et al. Essentials of English: Study and Thinking Skills. Mutya Publ. House, 2003.