„Constantine II”, Encyclopædia Britannica Online Academic Edition, Encyclopædia Britannica, 2011, Приступљено 12. 11. 2011, „On June 1, 1973, the military regime ruling Greece proclaimed a republic and abolished the Greek monarchy. A referendum on July 29, 1973, confirmed these actions. After the election of a civilian government in November 1974, another referendum on the monarchy was conducted on December 8. The monarchy was rejected, and Constantine, who had protested the vote of 1973, accepted the result.”
