Here is an example:

Department $($DepartmentID$,$ DepartmentName, ManagerID$)$

ManagerID references Employee

Employee $($EmployeeID$,$ FirstName, LastName, HireDate, DepartmentID$)$

DepartmentID references Department

PerformanceReview $($ReviewID$,$ ReviewDate, ReviewScore, Notes, EmployeeID, ManagerID$)$

EmployeeID references Employee

ManagerID references Employee