Cita APA

Schoenberg, I. E. (2012). Focus on grammar 2. (Fourth edition.). United States of America: Pearson.

Citación estilo Chicago

Schoenberg, Irene E. Focus On Grammar 2. Fourth edition. United States of America: Pearson, 2012.

Cita MLA

Schoenberg, Irene E. Focus On Grammar 2. Fourth edition. United States of America: Pearson, 2012.

Precaución: Estas citas no son 100% exactas.