Cita APA (7th ed.)

White, R. V. (1979). Functional english: 2.Exploitation (teacher´s book). Nelson.

Cita Chicago (17th ed.)

White, Ronald V. Functional English: 2.Exploitation (teacher´s Book). Londres, Inglaterra: Nelson, 1979.

Cita MLA (9th ed.)

White, Ronald V. Functional English: 2.Exploitation (teacher´s Book). Nelson, 1979.