Button, E. (1988). Psychological problems in primary health care. C. Helm.
Chicago Style aipamenaButton, Eric. Psychological Problems in Primary Health Care. London: C. Helm, 1988.
MLA aipamenaButton, Eric. Psychological Problems in Primary Health Care. C. Helm, 1988.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.