Energy and Man's Environment. Conservation of energy: Idea and activity guide. Energy and Man's Environment.
芝加哥风格引文Energy and Man's Environment. Conservation of Energy: Idea and Activity Guide. Portland, OR: Energy and Man's Environment.
MLA引文Energy and Man's Environment. Conservation of Energy: Idea and Activity Guide. Energy and Man's Environment.
警告：这些引文格式不一定是100％准确.