Παραπομπή APA

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.

Παραπομπή Chicago Style

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

Παραπομπή MLA

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

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.