Hannaford, J. (1968). Student's guide to Heilbroner: The economic problem. Prentice-Hall.
芝加哥风格引文Hannaford, John. Student's Guide to Heilbroner: The Economic Problem. Englewood Cliffs, N.J: Prentice-Hall, 1968.
MLA引文Hannaford, John. Student's Guide to Heilbroner: The Economic Problem. Prentice-Hall, 1968.
警告：这些引文格式不一定是100％准确.