ALLEN, R. (2014). ACTIVE GRAMMAR PRACTICE BOOK- 7. SCHOLASTIC.
Cita Chicago (17th ed.)ALLEN, ROSEMARY. ACTIVE GRAMMAR PRACTICE BOOK- 7. SCHOLASTIC, 2014.
Cita MLA (9th ed.)ALLEN, ROSEMARY. ACTIVE GRAMMAR PRACTICE BOOK- 7. SCHOLASTIC, 2014.
Atenció: Aquestes cites poden no estar 100% correctes.