Cita APA

Joyce H. S. Helen de Silva & Burns A. Anne. (1999). Focus on Grammar. Sydney, National Centre for English Language Teaching and Research, 1999.

Citación estilo Chicago

Joyce H. S. Helen de Silva and Burns A. Anne. Focus on Grammar. Sydney, National Centre for English Language Teaching and Research, 1999, 1999.

Cita MLA

Joyce H. S. Helen de Silva and Burns A. Anne. Focus on Grammar. Sydney, National Centre for English Language Teaching and Research, 1999, 1999.

Warning: These citations may not always be 100% accurate.