APA (7 ম সংস্করণ) উদ্ধৃতি

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

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

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