Boulding, K. (1970). Economics as a science. Mc Graw Hill.
Chicago Style aipamenaBoulding, K. Economics as a Science. New york: Mc Graw Hill, 1970.
MLA aipamenaBoulding, K. Economics as a Science. Mc Graw Hill, 1970.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.