Cita APA (7a ed.)

Horn, K. (1967). Long-term Planning. The Institute of National Planning.

Cita Chicago Style (17a ed.)

Horn, Karl-Heinz. Long-term Planning. Cairo: The Institute of National Planning, 1967.

Cita MLA (9a ed.)

Horn, Karl-Heinz. Long-term Planning. The Institute of National Planning, 1967.