APA
Bergersen F. J., . (1982). Root nodules of legumes. Chicago: Research Studies Press.
Chicago
Bergersen F J, . 1982. Root nodules of legumes. Chicago: Research Studies Press.
Harvard
Bergersen F. J., . (1982). Root nodules of legumes. Chicago: Research Studies Press.
MLA
Bergersen F J, . Root nodules of legumes. Chicago: Research Studies Press. 1982.