Cita APA (7a ed.)
Fuchs, M., Bonner, M., & Curtis, J. (2006). Focus on Grammar 4: An integrated skills approach (third edition.). Pearson Longman.
Cita Chicago Style (17a ed.)
Fuchs, Marjorie, Margaret Bonner, y Jane Curtis. Focus on Grammar 4: An Integrated Skills Approach. third edition. United State: Pearson Longman, 2006.
Cita MLA (9a ed.)
Fuchs, Marjorie, et al. Focus on Grammar 4: An Integrated Skills Approach. third edition. Pearson Longman, 2006.
Precaución: Estas citas no son 100% exactas.