Gaya APA

Tolman, M, N., Hardy, G, R. (1995). Discovering Elementary Science : Method , Content,and Problem-Solving Activities . London: Allyn and Bacon Inc.

Gaya MLA

Tolman, Marvin, N., Hardy, Garry, R. "Discovering Elementary Science : Method , Content,and Problem-Solving Activities". London: Allyn and Bacon Inc, 1995. Text.