APA-čujuhus (7. p.)
Block, R. N., Roberts, K., & Clarke, R. O. (2003). Labor standards in the United States and Canada. W.E. Upjohn Institute for Employment Research.
Chicago-čujuhus (17. p.)
Block, Richard N., Karen Roberts, juo Ronald O. Clarke. Labor Standards in the United States and Canada. Kalamazoo, Mich.: W.E. Upjohn Institute for Employment Research, 2003.
MLA-čujuhus (9. p.)
Block, Richard N., et al. Labor Standards in the United States and Canada. W.E. Upjohn Institute for Employment Research, 2003.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.