Laufer, I. (1979). Double contrast gastrointestinal radiology.
芝加哥风格引文Laufer, Igor. Double Contrast Gastrointestinal Radiology. 1979.
MLA引文Laufer, Igor. Double Contrast Gastrointestinal Radiology. 1979.
警告：这些引文格式不一定是100％准确.
APA引文