Dyfyniad APA

Sisam, J. (1947). The use of aerial survey in forestry and agriculture (6th.). Imperial forestry bureau and pastures and field crops.

Dyfyniad Arddull Chicago

Sisam, J.W.B. The Use of Aerial Survey in Forestry and Agriculture. 6th. Aberystwyth: Imperial forestry bureau and pastures and field crops, 1947.

Dyfyniad MLA

Sisam, J.W.B. The Use of Aerial Survey in Forestry and Agriculture. 6th. Imperial forestry bureau and pastures and field crops, 1947.

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