Fischel, W. J. (1964). William Popper (1874-1963) and his contribution to islamic scholarship: In memoriam / by Walter J. Fischel.
Chicago-Zitierstil (17. Ausg.)Fischel, Walter J. William Popper (1874-1963) and His Contribution to Islamic Scholarship: In Memoriam / by Walter J. Fischel. 1964.
MLA-Zitierstil (8. Ausg.)Fischel, Walter J. William Popper (1874-1963) and His Contribution to Islamic Scholarship: In Memoriam / by Walter J. Fischel. 1964.
警告：這些引文格式不一定是100％准確.