Dyfyniad APA

Villalobos, W., Rivera, C., & Harnmond, R. W. (1997). Occurrence of citrus viroids in Costa Rica.

Dyfyniad Arddull Chicago

Villalobos, W., C. Rivera, y R W. Harnmond. Occurrence of Citrus Viroids in Costa Rica. 1997.

Dyfyniad MLA

Villalobos, W., C. Rivera, y R W. Harnmond. Occurrence of Citrus Viroids in Costa Rica. 1997.

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