APA

Norwegian Agricultural Advisory Service, . (1987). Norwegian Journal of Agricultural Sciences. Supplement. As: .

Chicago

Norwegian Agricultural Advisory Service, . 1987. Norwegian Journal of Agricultural Sciences. Supplement. As: .

Harvard

Norwegian Agricultural Advisory Service, . (1987). Norwegian Journal of Agricultural Sciences. Supplement. As: .

MLA

Norwegian Agricultural Advisory Service, . Norwegian Journal of Agricultural Sciences. Supplement. As: . 1987.