There are many references to the writings of Marx, Engels, Lenin, Stalin, and Mao Tsetung. Taking accessibility into consideration, all those references are to the largest set of works published, as follows:
MESW – “Marx and Engels Selected Works” (3 volume set published by Foreign Language Publishing House, Moscow, 1969-70)
LCW – “Lenin, Collected Works” (45 volume set published by same, 1964-67)
SW – “Stalin, Works” (12 volume set published by same, 1952-55)
MSW – “Selected Works of Mao Tsetung” (4 volume set published by Foreign Language Press, Peking, 1965)
Where the article, speech, book, etc. is available as a separate publication, an asterisk follows the title. It is advisable to seek out older editions which are different in translation.
There are many references to material published by organizations.