APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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