Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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