Becker, R. A. (1985). Extending the S system. Wadsworth Advanced Books and Software.
Cita Chicago Style (17a ed.)Becker, R. A. Extending the S System. Monterey, California: Wadsworth Advanced Books and Software, 1985.
Cita MLA (9a ed.)Becker, R. A. Extending the S System. Wadsworth Advanced Books and Software, 1985.
Precaución: Estas citas no son 100% exactas.