Dyfyniad APA

DeFilippo, J., & Mackey, D. (1987). Grammar plus: A basic skills course for english language learners. Addison-Wesley Publ.Comp.

Dyfyniad Arddull Chicago

DeFilippo, Judy, and Daphne Mackey. Grammar Plus: A Basic Skills Course for English Language Learners. Addison-Wesley Publ.Comp, 1987.

Dyfyniad MLA

DeFilippo, Judy, and Daphne Mackey. Grammar Plus: A Basic Skills Course for English Language Learners. Addison-Wesley Publ.Comp, 1987.

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