Russell, R. C., & Dudley, H. (1975). Letter: Dangers of silent gall stones.
Citação norma ChicagoRussell, R C., and H. Dudley. Letter: Dangers of Silent Gall Stones. 1975.
MLA引文Russell, R C., and H. Dudley. Letter: Dangers of Silent Gall Stones. 1975.
警告:這些引文格式不一定是100%准確.