Cita APA (7a ed.)

Johnston, O. (2006). New Opportunities; education for life: Elementary language powerbook. Longman.

Cita Chicago Style (17a ed.)

Johnston, Olivia. New Opportunities; Education for Life: Elementary Language Powerbook. England: Longman, 2006.

Cita MLA (9a ed.)

Johnston, Olivia. New Opportunities; Education for Life: Elementary Language Powerbook. Longman, 2006.