Cita APA (7th ed.)

Epistola, N. V. (1967). Problem solving method: An approach to revitalize the teaching of social studies to academically superior children in the intermediate grades.

Cita Chicago (17th ed.)

Epistola, Nicetas V. Problem Solving Method: An Approach to Revitalize the Teaching of Social Studies to Academically Superior Children in the Intermediate Grades. 1967.

Cita MLA (9th ed.)

Epistola, Nicetas V. Problem Solving Method: An Approach to Revitalize the Teaching of Social Studies to Academically Superior Children in the Intermediate Grades. 1967.