Childress, R. L. (1974). Sets, matrices, and linear programming. Prentice-Hall, Inc.
Cita Chicago Style (17a ed.)Childress, Robert L. Sets, Matrices, and Linear Programming. Englewood Cliffs, N.J: Prentice-Hall, Inc, 1974.
Cita MLA (9a ed.)Childress, Robert L. Sets, Matrices, and Linear Programming. Prentice-Hall, Inc, 1974.
Precaución: Estas citas no son 100% exactas.