Dyfyniad APA

Black, C. (1968). Soil-Plant relationships (2nd.). Wiley Eastern.

Dyfyniad Arddull Chicago

Black, C.A. Soil-Plant Relationships. 2nd. New Delhi: Wiley Eastern, 1968.

Dyfyniad MLA

Black, C.A. Soil-Plant Relationships. 2nd. Wiley Eastern, 1968.

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