Cita APA (7a ed.)

Unesco. (1981). A systems approach to teaching and learning procedures: A guide for educators. Unesco.

Cita Chicago Style (17a ed.)

Unesco. A Systems Approach to Teaching and Learning Procedures: A Guide for Educators. París: Unesco, 1981.

Cita MLA (8a ed.)

Unesco. A Systems Approach to Teaching and Learning Procedures: A Guide for Educators. Unesco, 1981.