Cita APA (7a ed.)

Maurer, J. (1995). Focus on Grammar: An Advanced Course for Reference and Practice, Teacher's Manual. Longman.

Cita Chicago Style (17a ed.)

Maurer, Jay. Focus on Grammar: An Advanced Course for Reference and Practice, Teacher's Manual. New York: Longman, 1995.

Cita MLA (8a ed.)

Maurer, Jay. Focus on Grammar: An Advanced Course for Reference and Practice, Teacher's Manual. Longman, 1995.