APA-Zitierstil (7. Ausg.)

Harvard, J., & Negro, O. (1969). Teaching adults to speak a foreign language (2. ed. (rev. and expanded).). Univ. of London Pr.

Chicago-Zitierstil (17. Ausg.)

Harvard, Joseph, und Ottavio Negro. Teaching Adults to Speak a Foreign Language. 2. ed. (rev. and expanded). London: Univ. of London Pr, 1969.

MLA-Zitierstil (9. Ausg.)

Harvard, Joseph, und Ottavio Negro. Teaching Adults to Speak a Foreign Language. 2. ed. (rev. and expanded). Univ. of London Pr, 1969.