Malberbe, I. V. (1948). Soil fertility (3.). Oxford university press.
Chicago Style aipamenaMalberbe, I V. Soil Fertility. 3. U S A: Oxford university press, 1948.
MLA aipamenaMalberbe, I V. Soil Fertility. 3. Oxford university press, 1948.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.