Berry, R. (1994). The research project: How to write it (3rd.). Roultdge.
Chicago-čujuhus (17. p.)Berry, Ralph. The Research Project: How to Write It. 3rd. London: Roultdge, 1994.
MLA-čujuhus (9. p.)Berry, Ralph. The Research Project: How to Write It. 3rd. Roultdge, 1994.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.