Colton, D. L. (1976). Solution of boundary value problems by the method of integral operators. Pitman Pub..
Chicago-tyylinen lähdeviittausColton, David L. Solution of Boundary Value Problems by the Method of Integral Operators. London ; San Francisco: Pitman Pub., 1976.
MLA-viiteColton, David L. Solution of Boundary Value Problems by the Method of Integral Operators. Pitman Pub., 1976.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.