APA (7th ed.) Citation

Howard, E. W. (1969). Chemicals from nature. Published for the Nuffield Foundation by the Longmans/Penguin Books.

Chicago Style (17th ed.) Citation

Howard, E. W. Chemicals from Nature. London: Published for the Nuffield Foundation by the Longmans/Penguin Books, 1969.

MLA (9th ed.) Citation

Howard, E. W. Chemicals from Nature. Published for the Nuffield Foundation by the Longmans/Penguin Books, 1969.