APA
Royer M. e., . (1990). Major diseases of the tropics and sub-tropics of banana, cacao, cassava. Washington, D.C.US: United States. Department of Agriculture.
Chicago
Royer M.H ed, . 1990. Major diseases of the tropics and sub-tropics of banana, cacao, cassava. Washington, D.C.US: United States. Department of Agriculture.
Harvard
Royer M. e., . (1990). Major diseases of the tropics and sub-tropics of banana, cacao, cassava. Washington, D.C.US: United States. Department of Agriculture.
MLA
Royer M.H ed, . Major diseases of the tropics and sub-tropics of banana, cacao, cassava. Washington, D.C.US: United States. Department of Agriculture. 1990.