Dyfyniad APA

Tinbergen, J. (1967). Development planning. London: World University Library.

Dyfyniad Arddull Chicago

Tinbergen, Jan. Development Planning. London: World University Library, 1967.

Dyfyniad MLA

Tinbergen, Jan. Development Planning. London: World University Library, 1967.

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