Cita APA (7th ed.)

Gourville, H. d. The Modern handbook of English (6th.ed.). E.Crespillo.

Cita Chicago (17th ed.)

Gourville, H.D. de. The Modern Handbook of English. 6th.ed. Buenos Aires: E.Crespillo.

Cita MLA (9th ed.)

Gourville, H.D. de. The Modern Handbook of English. 6th.ed. E.Crespillo.