APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.