Dyfyniad APA

Trakia Journal of Sciences | Trakia University. Cambridge University Press.

Dyfyniad Arddull Chicago

Trakia Journal of Sciences | Trakia University. Cambridge University Press.

Dyfyniad MLA

Trakia Journal of Sciences | Trakia University. Cambridge University Press.

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