Cita APA (7a ed.)

Sutherland, M. E. (1947). One-step Problem Patterns and Their Relation to Problem Solving in Arithmetic. Columbia University.

Cita Chicago Style (17a ed.)

Sutherland, Mary Ethel. One-step Problem Patterns and Their Relation to Problem Solving in Arithmetic. New York: Columbia University, 1947.

Cita MLA (9a ed.)

Sutherland, Mary Ethel. One-step Problem Patterns and Their Relation to Problem Solving in Arithmetic. Columbia University, 1947.