APA (7th ed.) Zitazioa
Halford, N. G. (2012). Genetically modified crops (2nd ed.). Imperial College Press.
Chicago Style (17th ed.) Zitazioa
Halford, N. G. Genetically Modified Crops. 2nd ed. London: Imperial College Press, 2012.
MLA (9th ed.) Zitazioa
Halford, N. G. Genetically Modified Crops. 2nd ed. Imperial College Press, 2012.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.