Gaya APA

Swanson, C, P., L., M. (NULL). Observing Students And Teachers Through Objective Strategies . London:: London: Allyn and Bacon; 1997.

Gaya MLA

Swanson, Carl, P.., L., McNelly,Sharon. "Observing Students And Teachers Through Objective Strategies". London:: London: Allyn and Bacon; 1997, NULL. Text.