To download the source materials, the most reliable and official method is through the Oxford University Press (OUP) Student's Site . Official Resources (Oxford University Press)
Divided into Files 1–5 (52 MB) and Files 6–10 (31 MB). To download the source materials, the most reliable
Available in segments (e.g., Files 1–2, 3–4, etc.) with file sizes ranging from 57 MB to 83 MB per ZIP. To download the source materials
A collection of direct links for the Upper Intermediate 4e is maintained on VK.com , which includes the specific "Sources" ZIP (approximately 5.3 MB), video listening, and all-in-one audio archives. and all-in-one audio archives.