Abayan, P. B. Conservation rent in Philippine mining: Empirical measurements and some policy implications.
芝加哥风格引文Abayan, Perfecto B. Conservation Rent in Philippine Mining: Empirical Measurements and Some Policy Implications.
MLA引文Abayan, Perfecto B. Conservation Rent in Philippine Mining: Empirical Measurements and Some Policy Implications.
警告：这些引文格式不一定是100％准确.