RUFFIN, R. J., & GREGORY, P. R. (1988). Principles of microeconomics.-- Ed.3. Scott.
芝加哥风格引文RUFFIN, Roy J., 与 Paul R. GREGORY. Principles of Microeconomics.-- Ed.3. Boston: Scott, 1988.
MLA引文RUFFIN, Roy J., 与 Paul R. GREGORY. Principles of Microeconomics.-- Ed.3. Scott, 1988.
警告：这些引文格式不一定是100％准确.