Ker, N. R., & Piper, A. J. (1969). Medieval manuscripts in British libraries. Medieval manuscripts in British libraries.
芝加哥风格引文Ker, Neil R., 与 Alan J. Piper. "Medieval Manuscripts in British Libraries." Medieval Manuscripts in British Libraries 1969.
MLA引文Ker, Neil R., 与 Alan J. Piper. "Medieval Manuscripts in British Libraries." Medieval Manuscripts in British Libraries, 1969.
警告：这些引文格式不一定是100％准确.