Cita APA

Didier, S. E., & Samuela Eckstut Didier. (2006). Focus on grammar 1. New York, NY: Pearson education.

Chicago Style Citation

Didier, Samuela Eckstut, i Samuela Eckstut Didier. Focus On Grammar 1. New York, NY: Pearson education, 2006.

Cita MLA

Didier, Samuela Eckstut, i Samuela Eckstut Didier. Focus On Grammar 1. New York, NY: Pearson education, 2006.

Atenció: Aquestes cites poden no estar 100% correctes.