APA

Ockenden M., . (1972). Situational dialogues. London: Longman.

Chicago

Ockenden Michael, . 1972. Situational dialogues. London: Longman.

Harvard

Ockenden M., . (1972). Situational dialogues. London: Longman.

MLA

Ockenden Michael, . Situational dialogues. London: Longman. 1972.