Doff, A., Thaine, C., Stranks, J., Lewis-Jones, P., Godfrey, R., & Puchta, H. (2022). Empower A1 starter: Student's book A with digital pack (Second edition.). Cambridge University Press.
Chicago-čujuhus (17. p.)Doff, Adrian, Craig Thaine, Jeff Stranks, Peter Lewis-Jones, Rachel Godfrey, juo Herbert Puchta. Empower A1 Starter: Student's Book A with Digital Pack. Second edition. Cambridge, United Kingdom: Cambridge University Press, 2022.
MLA-čujuhus (9. p.)Doff, Adrian, et al. Empower A1 Starter: Student's Book A with Digital Pack. Second edition. Cambridge University Press, 2022.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.