I need a literature review for my research project. the references must be peer-

I need a literature review for my research project. the references must be peer-reviewed journals.
the Objective:
To enhance employee performance through the implementation of a comprehensive onboarding program.
the variables:
• Mediating variables:
1. Employee Engagement
2. Organizational Culture
• Independent variable:
1. Socialization
2. Orientation
• Dependent variable:
1. Employee performance
2. Employee Satisfaction
3. loyalty