Lawton,Thomas. (1993). Freer: A legacy of art. Smithsonian Institution.
芝加哥风格引文Lawton,Thomas. Freer: A Legacy of Art. Washington DC: Smithsonian Institution, 1993.
MLA引文Lawton,Thomas. Freer: A Legacy of Art. Smithsonian Institution, 1993.
警告：这些引文格式不一定是100％准确.