Dyfyniad APA

Villanueva, P. M. (1989). English skills for college freshmen. Katha Pub.

Dyfyniad Arddull Chicago

Villanueva, Perla M. English Skills for College Freshmen. Quezon City: Katha Pub, 1989.

Dyfyniad MLA

Villanueva, Perla M. English Skills for College Freshmen. Katha Pub, 1989.

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