Safford, B. R. (2005). Reach for Reference. Britannica Online School Edition: Will You Allow Students to Use It?
Cita Chicago Style (17a ed.)Safford, Barbara Ripp. Reach for Reference. Britannica Online School Edition: Will You Allow Students to Use It? 2005.
Cita MLA (9a ed.)Safford, Barbara Ripp. Reach for Reference. Britannica Online School Edition: Will You Allow Students to Use It? 2005.
Precaución: Estas citas no son 100% exactas.