APA
Phillips J., Pearl C. j. a., . (1973). Elements of Economics. New York: Macmillan.
Chicago
Phillips James, Pearl Carl joint author, . 1973. Elements of Economics. New York: Macmillan.
Harvard
Phillips J., Pearl C. j. a., . (1973). Elements of Economics. New York: Macmillan.
MLA
Phillips James, Pearl Carl joint author, . Elements of Economics. New York: Macmillan. 1973.