Cita APA (7th ed.)

Martin, L. A., & Shaughnessy, T. W. (1967). Progress and problems of Pennsylvania libraries: A resurvey. Pennsylvania State Library.

Cita Chicago (17th ed.)

Martin, Lowell Arthur, i Thomas W. Shaughnessy. Progress and Problems of Pennsylvania Libraries: A Resurvey. Harrisburg: Pennsylvania State Library, 1967.

Cita MLA (9th ed.)

Martin, Lowell Arthur, i Thomas W. Shaughnessy. Progress and Problems of Pennsylvania Libraries: A Resurvey. Pennsylvania State Library, 1967.