Billings, M. (2019). Structural Geology (8th.). Pearson.
Chicago-čujuhus (17. p.)Billings, Marland. Structural Geology. 8th. New Delhi: Pearson, 2019.
MLA-čujuhus (9. p.)Billings, Marland. Structural Geology. 8th. Pearson, 2019.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.