Cita APA

Frankel, I., & Irene Frankel. (2008). Center Stage 1: Express yourself in English. White Plains, N.Y: Pearson Longman.

Chicago Style Citation

Frankel, Irene, i Irene Frankel. Center Stage 1: Express Yourself in English. White Plains, N.Y: Pearson Longman, 2008.

Cita MLA

Frankel, Irene, i Irene Frankel. Center Stage 1: Express Yourself in English. White Plains, N.Y: Pearson Longman, 2008.

Atenció: Aquestes cites poden no estar 100% correctes.