Heywood, V. H. (1971). biology and chemistry of Umbelliferae. Academic Press.
Chicago Style aipamenaHeywood, V H. Biology and Chemistry of Umbelliferae. London: Academic Press, 1971.
MLA aipamenaHeywood, V H. Biology and Chemistry of Umbelliferae. Academic Press, 1971.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.