APA aipamena

Bonesteel, L., & Lynn Bonesteel; Samuela Eckstut-Didier. (2008). Center stage. 2: Grammar to communicate. White Plains, N.Y: Pearson Longman.

Chicago Style aipamena

Bonesteel, Lynn, và Lynn Bonesteel; Samuela Eckstut-Didier. Center Stage. 2: Grammar to Communicate. White Plains, N.Y: Pearson Longman, 2008.

MLA aipamena

Bonesteel, Lynn, và Lynn Bonesteel; Samuela Eckstut-Didier. Center Stage. 2: Grammar to Communicate. White Plains, N.Y: Pearson Longman, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.