APA (7th ed.) Citation

Cooper, P. S. A. (1971). Correct your English: Dialogues and difficulties (2.Aufl.). Hueber.

Chicago Style (17th ed.) Citation

Cooper, Peter S. A. Correct Your English: Dialogues and Difficulties. 2.Aufl. München: Hueber, 1971.

MLA (9th ed.) Citation

Cooper, Peter S. A. Correct Your English: Dialogues and Difficulties. 2.Aufl. Hueber, 1971.

Warning: These citations may not always be 100% accurate.