Cita APA (7th ed.)

Fuchs, M., Bonner, M., & Westheimer, M. (2000). Focus on grammar: An intermediate course for reference and practice (2a. ed.). Pearson Education.

Cita Chicago (17th ed.)

Fuchs, Marjorie, Margaret Bonner, i Miriam Westheimer. Focus on Grammar: An Intermediate Course for Reference and Practice. 2a. ed. Nueva York: Pearson Education, 2000.

Cita MLA (9th ed.)

Fuchs, Marjorie, et al. Focus on Grammar: An Intermediate Course for Reference and Practice. 2a. ed. Pearson Education, 2000.