APA引文

Tiberio, S. C. (2006). Focus on grammar 3: An integrated skills approach. Teacher's manual (3.). Pearson Education.

Chicago Style (17th ed.) Citation

Tiberio, Silvia Carolina. Focus on Grammar 3: An Integrated Skills Approach. Teacher's Manual. 3. Colombia: Pearson Education, 2006.

MLA引文

Tiberio, Silvia Carolina. Focus on Grammar 3: An Integrated Skills Approach. Teacher's Manual. 3. Pearson Education, 2006.