Williamson, M. (1972). Analysis of geological populations. Unwin.
Chicago Style aipamenaWilliamson, Mark. Analysis of Geological Populations. London: Unwin, 1972.
MLA aipamenaWilliamson, Mark. Analysis of Geological Populations. Unwin, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.