Smith, K. F. (1981). Applied survey methods for development projects. The U.S. Agency for International Development, Office of Personnel Management, Training and Development Division.
Cita Chicago (17th ed.)Smith, Kenneth F. Applied Survey Methods for Development Projects. Washington, D.C: The U.S. Agency for International Development, Office of Personnel Management, Training and Development Division, 1981.
Cita MLA (9th ed.)Smith, Kenneth F. Applied Survey Methods for Development Projects. The U.S. Agency for International Development, Office of Personnel Management, Training and Development Division, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.