Cita APA

Koch, R. S. (1995). Focus on grammar: An advanced ourse for reference and practice workbook (1a. ed.). Harlow: Longman.

Citación estilo Chicago

Koch, Rachel Spack. Focus On Grammar: An Advanced Ourse for Reference and Practice Workbook. 1a. ed. Harlow: Longman, 1995.

Cita MLA

Koch, Rachel Spack. Focus On Grammar: An Advanced Ourse for Reference and Practice Workbook. 1a. ed. Harlow: Longman, 1995.