Alex Macleod, The French and the Italian Communist Parties and the Portuguese Revolution, Duhram, 1979.
Neil Mclnnes, Os Partidos Comunistas da Europa Ocidental, Lisboa, Europa-America s d.
Keith Middlemas, Power and the Party; Changing Faces of Communisme in Western Europe, Londres, Deutsch, 1980.
Eusébio Mujal-Leon., Portuguese and Spanish Communisme in Comparative Perspective
A Report on West European Communist Parties, Prepared by the Foreign Affaires and National Defense Division of the Congressional Research Service Library of Congress, Submitted by Senator Edward W Brooke to the Comittee on Appropriations United States Senate, Washington, 1977.
Lawrence L Whetten, New International Communism the Foreign and Defense Policies of the Latin European Communist Parties, Lexington-Toronto. Lexington Books, 1982.
[Inclui dois estudos sobre o PCP]
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