This would not be acceptable Unless the book gained some source of authoritativeness as it was translated for instance if it were peer reviewed in another language or if it were printed by a significant publisher the kind that expects to make a profit by selling the book not by being paid to print it then it s not a reliable source and thus there are no reliable sources that call the Kemeny Young method VoteFair Also you re playing with Wikipedia rules It doesn t make a conflict of interest go away if you get someone else to add something for you