Dyfyniad APA

(1973). Soil Testing And Plant Analysis. Soil Science Society of Americ.

Dyfyniad Arddull Chicago

Soil Testing And Plant Analysis. Soil Science Society of Americ, 1973.

Dyfyniad MLA

Soil Testing And Plant Analysis. Soil Science Society of Americ, 1973.

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