Petre, M., & Rugg, G. (2010). The unwritten rules of PhD research (2nd ed.). Open University Press.
芝加哥风格引文Petre, Marian, 与 Gordon Rugg. The Unwritten Rules of PhD Research. 2nd ed. Maidenhead, England: Open University Press, 2010.
MLA引文Petre, Marian, 与 Gordon Rugg. The Unwritten Rules of PhD Research. 2nd ed. Open University Press, 2010.
警告：这些引文格式不一定是100％准确.