APA
National research council : board agriculture and reneivable resources, . (1976). Urec and other nonprotein nitrogen compounds in animal nutrition. Washington: National Academy of Sciences (NAS).
Chicago
National research council : board agriculture and reneivable resources, . 1976. Urec and other nonprotein nitrogen compounds in animal nutrition. Washington: National Academy of Sciences (NAS).
Harvard
National research council : board agriculture and reneivable resources, . (1976). Urec and other nonprotein nitrogen compounds in animal nutrition. Washington: National Academy of Sciences (NAS).
MLA
National research council : board agriculture and reneivable resources, . Urec and other nonprotein nitrogen compounds in animal nutrition. Washington: National Academy of Sciences (NAS). 1976.