Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.