Sheen, F. J. (1954). Life Is Worth Living. McGraw-Hill.
Chicago-Zitierstil (17. Ausg.)Sheen, Fulton J. Life Is Worth Living. New York ; Toronto ; London: McGraw-Hill, 1954.
MLA-Zitierstil (8. Ausg.)Sheen, Fulton J. Life Is Worth Living. McGraw-Hill, 1954.
警告：這些引文格式不一定是100％准確.