GILL, R. T. (1978). Economics: A text with readings.-- ed.3. Goodyear Pub.
芝加哥风格引文GILL, Richard T. Economics: A Text with Readings.-- Ed.3. California: Goodyear Pub, 1978.
MLA引文GILL, Richard T. Economics: A Text with Readings.-- Ed.3. Goodyear Pub, 1978.
警告：这些引文格式不一定是100％准确.