Shaffer, D. (2007). Developmental psychology (7th.). Thomson Learning.
Chicago-čujuhus (17. p.)Shaffer, D. Developmental Psychology. 7th. Australia: Thomson Learning, 2007.
MLA-čujuhus (9. p.)Shaffer, D. Developmental Psychology. 7th. Thomson Learning, 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.