Maris, A. (2016). Intermediate outcomes: Workbook (second edition.). National Geographic Learning Cengage Learning.
Chicago-viite (17. p.)Maris, Amanda. Intermediate Outcomes: Workbook. second edition. Hampshire: National Geographic Learning Cengage Learning, 2016.
MLA-viite (9. p.)Maris, Amanda. Intermediate Outcomes: Workbook. second edition. National Geographic Learning Cengage Learning, 2016.
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