Becker, R. A. (1985). Extending the S system. Wadsworth Advanced Books and Software.
Citación estilo ChicagoBecker, R. A. Extending the S System. Monterey, California: Wadsworth Advanced Books and Software, 1985.
Cita MLABecker, R. A. Extending the S System. Wadsworth Advanced Books and Software, 1985.
Warning: These citations may not always be 100% accurate.