Dagot, T. S. (1974). Self-instructional materials in English grammar. Alemar-Phoenix Pub. House.
Dyfyniad Arddull ChicagoDagot, Tomasita S. Self-instructional Materials in English Grammar. Quezon City: Alemar-Phoenix Pub. House, 1974.
Dyfyniad MLADagot, Tomasita S. Self-instructional Materials in English Grammar. Alemar-Phoenix Pub. House, 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.