1. INTRODUCTION

Learning encourages innovativeness and creative thoughts and enhances the old traditional approaches by acquiring the learning system for attaining the desired goals. This essay will focus on the work of three vital researchers including Barry Zimmerman (2000), Etienne Wenger (2000) and Yrjo Engestrom (2001) who presented theories on "self efficacy", "social learning system" and "expansive learning at work" respectively. This essay also compares these three theories and how their perspectives influence human resource development practices in the organization and also conclude the theory out of these three which benefits the employees most at the workplace.

2. OVERVIEW OF THEORIES
A brief overview of the three learning theories is as follows:
2.1 Self Efficacy

Self-efficacy is one 's belief of having ability to perform particular task and accomplish desired goals. The feeling of self-efficacy plays important role in achieving the goals. According to Zimmerman, self-efficacy motivates the students and helps them taking new challenges in life by consistent learning. Self-efficacy differs from several motivational constructs and self-efficacious students are hardworking, more emotionally stable and can handle difficult situations efficiently when compared to inefficacious students.

Self-efficacy concept was explained by Zimmerman by using references from diverse authors. Bandura (1977a, 1997) described self-efficacy as individual judgments of one 's