COTTLER, J. (1966). Alfred Wallace: Explorer - naturalist. Little, Brown.
芝加哥风格引文COTTLER, Joseph. Alfred Wallace: Explorer - Naturalist. Little, Brown, 1966.
MLA引文COTTLER, Joseph. Alfred Wallace: Explorer - Naturalist. Little, Brown, 1966.
警告：这些引文格式不一定是100％准确.