Molland, G. Sign conceptions in mathematics in the Latin Middle Ages: George Molland. [Semiotik, 1].(1997).
Chicago-Zitierstil (17. Ausg.)Molland, George. "Sign Conceptions in Mathematics in the Latin Middle Ages: George Molland." [Semiotik, 1].(1997) .
MLA-Zitierstil (8. Ausg.)Molland, George. "Sign Conceptions in Mathematics in the Latin Middle Ages: George Molland." [Semiotik, 1].(1997), .
警告：這些引文格式不一定是100％准確.