Cita APA (7th ed.)
Allen, H. R. (1963). Open door to learning: The land-grant system enters its second century.
Cita Chicago (17th ed.)
Allen, Herman R. Open Door to Learning: The Land-grant System Enters Its Second Century. 1963.
Cita MLA (9th ed.)
Allen, Herman R. Open Door to Learning: The Land-grant System Enters Its Second Century. 1963.
Atenció: Aquestes cites poden no estar 100% correctes.