Littell, M. (1994). Gateways to mathematical investigations (Teacher's ed.). McDougal,Littell & Co..
Citación estilo ChicagoLittell, McDougal. Gateways to Mathematical Investigations. Teacher's ed. Dallas: McDougal,Littell & Co., 1994.
Cita MLALittell, McDougal. Gateways to Mathematical Investigations. Teacher's ed. McDougal,Littell & Co., 1994.
Warning: These citations may not always be 100% accurate.