Cita APA (7a ed.)

Scrivener, J., & Jones, C. (2012). Straightforward: Upper intermediate : Student`s book. B2 (2nd ed.). Macmillan Education.

Cita Chicago Style (17a ed.)

Scrivener, Jim, y Ceri Jones. Straightforward: Upper Intermediate : Student`s Book. B2. 2nd ed. London: Macmillan Education, 2012.

Cita MLA (9a ed.)

Scrivener, Jim, y Ceri Jones. Straightforward: Upper Intermediate : Student`s Book. B2. 2nd ed. Macmillan Education, 2012.