APA

Sutherland M. E., . (1947). One-step problem patterns and their relation to problem solving in arithmetic. New York: Columbia University.

Chicago

Sutherland Mary Ethel, . 1947. One-step problem patterns and their relation to problem solving in arithmetic. New York: Columbia University.

Harvard

Sutherland M. E., . (1947). One-step problem patterns and their relation to problem solving in arithmetic. New York: Columbia University.

MLA

Sutherland Mary Ethel, . One-step problem patterns and their relation to problem solving in arithmetic. New York: Columbia University. 1947.