Gaya APA

Welton, D, A., Mallan, J, T. (1981). Children and their world : strategies for teaching social studies (2nd ed). Boston, MA: Houghton Mifflin.

Gaya MLA

Welton, David, A.., Mallan, John, T.. "Children and their world : strategies for teaching social studies". 2nd ed Boston, MA: Houghton Mifflin, 1981. Text.