APA
Fletcher R., . (1972). FORTRAN subroutine for minimization by the method of conjugate gradients. Harwell, Berkshire: Atomic Energy Research Establishment. Report nr AERE R 7073.
Chicago
Fletcher R, . 1972. FORTRAN subroutine for minimization by the method of conjugate gradients. Harwell, Berkshire: Atomic Energy Research Establishment. Report nr AERE R 7073.
Harvard
Fletcher R., . (1972). FORTRAN subroutine for minimization by the method of conjugate gradients. Harwell, Berkshire: Atomic Energy Research Establishment. Report nr AERE R 7073.
MLA
Fletcher R, . FORTRAN subroutine for minimization by the method of conjugate gradients. Harwell, Berkshire: Atomic Energy Research Establishment. Report nr AERE R 7073. 1972.