APA-čujuhus (7. p.)

Delvin, S. (2007). environmental problems and issues. Sarup.

Chicago-čujuhus (17. p.)

Delvin, Samuel. Environmental Problems and Issues. New Delhi: Sarup, 2007.

MLA-čujuhus (9. p.)

Delvin, Samuel. Environmental Problems and Issues. Sarup, 2007.

Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.