Cita APA

Schoenberg, I. E., & Irene E. Schoenberg. (2006). Focus on grammar. White Plains, NY: Pearson Longman.

Chicago Style Citation

Schoenberg, Irene E., i Irene E. Schoenberg. Focus On Grammar. White Plains, NY: Pearson Longman, 2006.

Cita MLA

Schoenberg, Irene E., i Irene E. Schoenberg. Focus On Grammar. White Plains, NY: Pearson Longman, 2006.

Atenció: Aquestes cites poden no estar 100% correctes.