APA (7th ed.) Citation

Allen, J., & Baron, A. (1993). What is a wall after all? Walker Books Ltd.

Chicago Style (17th ed.) Citation

Allen, Judy, and Alan Baron. What Is a Wall After All? London: Walker Books Ltd, 1993.

MLA (9th ed.) Citation

Allen, Judy, and Alan Baron. What Is a Wall After All? Walker Books Ltd, 1993.