Dyfyniad APA

DACOSTA, S. STEP UP ! WITH GRAMMAR- 7. FRANK EDUCATIONAL AIDS.

Dyfyniad Arddull Chicago

DACOSTA, STEPHEN. STEP UP ! WITH GRAMMAR- 7. NEW DELHI: FRANK EDUCATIONAL AIDS.

Dyfyniad MLA

DACOSTA, STEPHEN. STEP UP ! WITH GRAMMAR- 7. FRANK EDUCATIONAL AIDS.

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