Martin, L. A., & Shaughnessy, T. W. (1967). Progress and problems of Pennsylvania libraries: A resurvey. Pennsylvania State Library.
芝加哥风格引文Martin, Lowell Arthur, 与 Thomas W. Shaughnessy. Progress and Problems of Pennsylvania Libraries: A Resurvey. Harrisburg: Pennsylvania State Library, 1967.
MLA引文Martin, Lowell Arthur, 与 Thomas W. Shaughnessy. Progress and Problems of Pennsylvania Libraries: A Resurvey. Pennsylvania State Library, 1967.
警告：这些引文格式不一定是100％准确.