American Psychological Association
Marx, Karl, & Engels, Frederick ( 1977 ). Selected Works in Three Volumes ( 00 ed. ). Progress Publishers.
Modern Language Association
Marx, Karl and Engels, Frederick. Selected Works in Three Volumes . Progress Publishers. 1977
Chicago Citation
Marx, Karl and Engels, Frederick. Selected Works in Three Volumes . 00 .Moscow
: Progress Publishers, 1977.
American Medical Association
Marx, Karl and Engels, Frederick. Selected Works in Three Volumes . Progress Publishers; 1977.
