APA (7th ed.) Citation

O'Neill, R. (1970). English in situations (1a. ed.). Oxford University.

Chicago Style (17th ed.) Citation

O'Neill, Robert. English in Situations. 1a. ed. Londres: Oxford University, 1970.

MLA (9th ed.) Citation

O'Neill, Robert. English in Situations. 1a. ed. Oxford University, 1970.