JOHNSON, G. B., & OBER, W. C. (2010). Essentials of the living world. Mc Graw-Hill.
Chicago-čujuhus (17. p.)JOHNSON, George B., juo William C. OBER. Essentials of the Living World. Mc Graw-Hill, 2010.
MLA-čujuhus (9. p.)JOHNSON, George B., juo William C. OBER. Essentials of the Living World. Mc Graw-Hill, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.