Cita APA (7a ed.)

Ridout, R., & Greed, T. S. (1975). Guided conversations for learners of English: Stage one. Macmillan.

Cita Chicago Style (17a ed.)

Ridout, Ronald, y T. S. Greed. Guided Conversations for Learners of English: Stage One. London: Macmillan, 1975.

Cita MLA (8a ed.)

Ridout, Ronald, y T. S. Greed. Guided Conversations for Learners of English: Stage One. Macmillan, 1975.