Gaya APA

WELTON, D, A., MALLAN, J, T. (1981). Children and their world (2nd ed.). Boston: Houghton Mifflin Company.

Gaya MLA

WELTON, David, A.., MALLAN, John, T.. "Children and their world". 2nd ed. Boston: Houghton Mifflin Company, 1981. Text.