APA-čujuhus (7. p.)
Humboldt, W., Buch, G. C., & Raven, F. A. Linguistic variability: Intellectual development.
Chicago-čujuhus (17. p.)
Humboldt, Wilhelm, George C. Buch, juo Frithjof A. Raven. Linguistic Variability: Intellectual Development.
MLA-čujuhus (9. p.)
Humboldt, Wilhelm, et al. Linguistic Variability: Intellectual Development.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.