Berry, R. (1995). The Research project: How to write it (3rd ed.). Routledge.
Chicago-čujuhus (17. p.)Berry, Ralph. The Research Project: How to Write It. 3rd ed. London: Routledge, 1995.
MLA-čujuhus (9. p.)Berry, Ralph. The Research Project: How to Write It. 3rd ed. Routledge, 1995.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.