Attfield, R. (1995). Value, obligation, and meta-ethics. Editions Rodopi.
芝加哥风格引文Attfield, Robin. Value, Obligation, and Meta-ethics. Amsterdam ; Atlanta, Ga.: Editions Rodopi, 1995.
MLA引文Attfield, Robin. Value, Obligation, and Meta-ethics. Editions Rodopi, 1995.
警告：这些引文格式不一定是100％准确.
