Heather, N., & Robertson, I. (1985). Problem drinking. Penguin books.
Chicago Style (17th ed.) CitationHeather, Nick, and Ian Robertson. Problem Drinking. Harmondsworth: Penguin books, 1985.
MLA (9th ed.) CitationHeather, Nick, and Ian Robertson. Problem Drinking. Penguin books, 1985.
Warning: These citations may not always be 100% accurate.