Tan, E. L., & Mandin, B. L. (1993). Instrumental skills in the values development process. Values Education Program, Miriam College Graduate School.
Cita Chicago (17th ed.)Tan, Earnest L., i Belen L. Mandin. Instrumental Skills in the Values Development Process. Quezon City: Values Education Program, Miriam College Graduate School, 1993.
Cita MLA (9th ed.)Tan, Earnest L., i Belen L. Mandin. Instrumental Skills in the Values Development Process. Values Education Program, Miriam College Graduate School, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.