Avila, D. M., Cruz, M. B. L., & Trajano, M. G. (2003). Essentials of English: Study and thinking skills. Mutya Publ. House.
Citazione stile Chigago Style (17a edizione)Avila, Dorcas M., Ma. Beatriz L. Cruz, e Mercedes G. Trajano. Essentials of English: Study and Thinking Skills. Valenzuela City: Mutya Publ. House, 2003.
Citatione MLA (9a ed.)Avila, Dorcas M., et al. Essentials of English: Study and Thinking Skills. Mutya Publ. House, 2003.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.