Supharat Thiranantanakorn และ Chawewan Ratanaprasert. (2009) Congruence Lattices of Finite Unary Algebras. Silpakorn University:ม.ป.ท.Supharat Thiranantanakorn และ Chawewan Ratanaprasert. 2009. Congruence Lattices of Finite Unary Algebras. ม.ป.ท.:Silpakorn University;Supharat Thiranantanakorn และ Chawewan Ratanaprasert. Congruence Lattices of Finite Unary Algebras. ม.ป.ท.:Silpakorn University, 2009. Print.