APA Citatie

Dummett, P., Hughes, J., & Stephenson, H. Life: Pre- intermediate student's book with online workbook. Singapore.

Chicago Style citaat

Dummett, Paul, John Hughes, en Helen Stephenson. Life: Pre- Intermediate Student's Book With Online Workbook. Singapore.

MLA citatie

Dummett, Paul, John Hughes, en Helen Stephenson. Life: Pre- Intermediate Student's Book With Online Workbook. Singapore.