APA
Gibson A., Butty M. jt. author, . (1975). Overfermented coffee beans. Hamburg: East African Industrial Research Organization.
Chicago
Gibson A, Butty M. jt. author, . 1975. Overfermented coffee beans. Hamburg: East African Industrial Research Organization.
Harvard
Gibson A., Butty M. jt. author, . (1975). Overfermented coffee beans. Hamburg: East African Industrial Research Organization.
MLA
Gibson A, Butty M. jt. author, . Overfermented coffee beans. Hamburg: East African Industrial Research Organization. 1975.