APA-viite

Hughes, J., Dummett, P., & Stephenson, H. (2015). Life: Elementary. Student's Book with Online Workbook . A1 - A2 (Vietnam edtion.). Singapore: National Geographic Learning; Cengage Learning.

Chicago-tyylinen lähdeviittaus

Hughes, John, Paul Dummett, ja Helen Stephenson. Life: Elementary. Student's Book With Online Workbook . A1 - A2. Vietnam edtion. Singapore: National Geographic Learning; Cengage Learning, 2015.

MLA-viite

Hughes, John, Paul Dummett, ja Helen Stephenson. Life: Elementary. Student's Book With Online Workbook . A1 - A2. Vietnam edtion. Singapore: National Geographic Learning; Cengage Learning, 2015.

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