(1964). Manual on conservation of soil and water. Oxford & IBH publishing company.
Chicago Style aipamenaManual on Conservation of Soil and Water. Newdelhi: Oxford & IBH publishing company, 1964.
MLA aipamenaManual on Conservation of Soil and Water. Oxford & IBH publishing company, 1964.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.