Ladefoged, P., & Maddieson, I. (1996). The sounds of the world's languages: Peter Ladefoged and Ian Maddieson. Blackwell Publishers.
Chicago Style (17th ed.) CitationLadefoged, Peter, and Ian Maddieson. The Sounds of the World's Languages: Peter Ladefoged and Ian Maddieson. Oxford, OX, UK ; Cambridge, Mass., USA: Blackwell Publishers, 1996.
MLA (8th ed.) CitationLadefoged, Peter, and Ian Maddieson. The Sounds of the World's Languages: Peter Ladefoged and Ian Maddieson. Blackwell Publishers, 1996.
Warning: These citations may not always be 100% accurate.