Casual Callers: It is an external source of recruitment. Generally the large business organisation maintain an application file in which they keep all the pending application which the job seekers leave with the reception, sometimes the application of suitable candidate who were not selected in previous years selection process are also kept in application file. This application file is considered as a waiting list.
Whenever there is a job vacancy the suitable candidates from the waiting list are called for the selection process.
Labour contractor: It is also external source of recruitment. In this, organisation tells its requirement of labour to contractors. Contractors maintain close contact with labours and they provide the required number of unskilled workers at short notice, the contractor charge commission for this work.