Lazarsfeld, P. F., & Sieber, S. D. (1964). Organizing educational research: An exploration. Prentice-Hall.
Cita Chicago (17th ed.)Lazarsfeld, Paul Felix, i Sam D. Sieber. Organizing Educational Research: An Exploration. Englewood Cliffs, N. J: Prentice-Hall, 1964.
Cita MLA (9th ed.)Lazarsfeld, Paul Felix, i Sam D. Sieber. Organizing Educational Research: An Exploration. Prentice-Hall, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.