Gibbs, R. (2000). Why ethics?: Signs of responsibilities. Princeton University Press.
芝加哥风格引文Gibbs, Robert. Why Ethics?: Signs of Responsibilities. Princeton, N.J.: Princeton University Press, 2000.
MLA引文Gibbs, Robert. Why Ethics?: Signs of Responsibilities. Princeton University Press, 2000.
警告：这些引文格式不一定是100％准确.