Dyfyniad APA

Ngumy, J. G. (1992). Agroforestry in dryland Africa: Teacher's manual. Sweden: SIDA's Regional Soil Conservation Unit, RSCU.

Dyfyniad Arddull Chicago

Ngumy, James G. Agroforestry in Dryland Africa: Teacher's Manual. Sweden: SIDA's Regional Soil Conservation Unit, RSCU, 1992.

Dyfyniad MLA

Ngumy, James G. Agroforestry in Dryland Africa: Teacher's Manual. Sweden: SIDA's Regional Soil Conservation Unit, RSCU, 1992.

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