Ulvaeus. The Book of Music and Nature. Wesleyan University Press.
Chicago-čujuhus (17. p.)Ulvaeus. The Book of Music and Nature. Wesleyan University Press.
MLA-čujuhus (9. p.)Ulvaeus. The Book of Music and Nature. Wesleyan University Press.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.