Charles, S. J. (1961). Research and public health. Oxford University Press.
Chicago Style (17th ed.) ZitazioaCharles, Sir John. Research and Public Health. London: Oxford University Press, 1961.
MLA (9th ed.) ZitazioaCharles, Sir John. Research and Public Health. Oxford University Press, 1961.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.