APA
Beven K. J., Callen J. L., . (1979). HYDRODAT - a system of FORTRAN computer programs for the preparation and analysis of hydrological data from charts. Norwich: British Geomorphological Research Group.
Chicago
Beven Keith J, Callen J L, . 1979. HYDRODAT - a system of FORTRAN computer programs for the preparation and analysis of hydrological data from charts. Norwich: British Geomorphological Research Group.
Harvard
Beven K. J., Callen J. L., . (1979). HYDRODAT - a system of FORTRAN computer programs for the preparation and analysis of hydrological data from charts. Norwich: British Geomorphological Research Group.
MLA
Beven Keith J, Callen J L, . HYDRODAT - a system of FORTRAN computer programs for the preparation and analysis of hydrological data from charts. Norwich: British Geomorphological Research Group. 1979.