Hamp, E. P., Gutiérrez, A. L., & Rankin, E. (1979). Composition plus level F. Harper and Row.
Chicago-čujuhus (17. p.)Hamp, Eric P., Arturo Luis Gutiérrez, juo Earl Rankin. Composition Plus Level F. Harper and Row, 1979.
MLA-čujuhus (9. p.)Hamp, Eric P., et al. Composition Plus Level F. Harper and Row, 1979.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.