Harris, M. (2006). New Oportunities education for life: Elementary students' book. Longman.
Cita Chicago Style (17a ed.)Harris, Michael. New Oportunities Education for Life: Elementary Students' Book. England: Longman, 2006.
Cita MLA (9a ed.)Harris, Michael. New Oportunities Education for Life: Elementary Students' Book. Longman, 2006.
警告：這些引文格式不一定是100％准確.