APA引文

Marx,Karl, & Engels,Frederick. (1980). Karl Marx Frederick Engels: Collected works. Progress Publishers.

Chicago Edition Citation

Marx,Karl, and Engels,Frederick. Karl Marx Frederick Engels: Collected Works. Moscow: Progress Publishers, 1980.

MLA引文

Marx,Karl, and Engels,Frederick. Karl Marx Frederick Engels: Collected Works. Progress Publishers, 1980.

警告：這些引文格式不一定是100％准確.