APA (7th ed.) Citation

penguin books & Donaldson, P. (1984). A question of economics. penguin books.

Chicago Style (17th ed.) Citation

penguin books and P. Donaldson. A Question of Economics. London: penguin books, 1984.

MLA (8th ed.) Citation

penguin books and P. Donaldson. A Question of Economics. penguin books, 1984.