Encapsulation Courses

Patrones de diseño de software y principios SOLID.
Udemy

C# OOP Kamp: Nesne Tabanlı Programlamayı Sıfırdan Öğrenin
Udemy

The Java Object-Oriented Approach (Java SE 11 Developer Certification 1Z0-819)
Pluralsight

Programming in Java
NPTEL via YouTube

Object-Oriented Programming Concepts
LearnQuest via Coursera

Core Python: Classes and Object-orientation
Pluralsight

Creating Object-oriented TypeScript Code
Pluralsight

Making Your Java Code More Object-oriented
Pluralsight

How to implement array based stack in C
Coursera Project Network via Coursera

Advanced Python
YouTube