Cita APA

Schoenberg, I. E. 1., & Schoenberg, I. E. 1. (2000). Focus on grammar: A basic course for reference and practice (2. edition.). White Plains, N.Y.: Longman.

Citación estilo Chicago

Schoenberg, Irene E. 1946-, y Irene E. 1946- Schoenberg. Focus On Grammar: A Basic Course for Reference and Practice. 2. edition. White Plains, N.Y.: Longman, 2000.

Cita MLA

Schoenberg, Irene E. 1946-, y Irene E. 1946- Schoenberg. Focus On Grammar: A Basic Course for Reference and Practice. 2. edition. White Plains, N.Y.: Longman, 2000.