Dyfyniad APA

Robles, R. D., & Estioco, J. C. (2009). Improving grammar skills and more (Revised edition.). Rex Book Store.

Dyfyniad Arddull Chicago

Robles, Rosemarie D., and Joanalyn C. Estioco. Improving Grammar Skills and More. Revised edition. Manila: Rex Book Store, 2009.

Dyfyniad MLA

Robles, Rosemarie D., and Joanalyn C. Estioco. Improving Grammar Skills and More. Revised edition. Rex Book Store, 2009.

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