APA (7th ed.) Citation

De Keyser, E. (1979). Guide to world commodity markets (Second edition.). Kogan Page.

Chicago Style (17th ed.) Citation

De Keyser, Ethel. Guide to World Commodity Markets. Second edition. London: Kogan Page, 1979.

MLA (9th ed.) Citation

De Keyser, Ethel. Guide to World Commodity Markets. Second edition. Kogan Page, 1979.

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