Bond Ruskin. The World Of Trees. National Book Trust.
Chicago-čujuhus (17. p.)Bond Ruskin. The World Of Trees. 1975 1975: National Book Trust.
MLA-čujuhus (9. p.)Bond Ruskin. The World Of Trees. National Book Trust.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.