APA-čujuhus (7. p.)
Petre, M., & Rugg, G. (2010). The unwritten rules of PhD research (2nd ed.). Open University Press.
Chicago-čujuhus (17. p.)
Petre, Marian, juo Gordon Rugg. The Unwritten Rules of PhD Research. 2nd ed. Maidenhead, England: Open University Press, 2010.
MLA-čujuhus (9. p.)
Petre, Marian, juo Gordon Rugg. The Unwritten Rules of PhD Research. 2nd ed. Open University Press, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.