Vocational and Industrial Training Board. VITB news. Vocational and Industrial Training Board.
Παραπομπή σε μορφή Chicago (17η εκδ.)Vocational and Industrial Training Board. VITB News. Singapore: Vocational and Industrial Training Board.
Παραπομπή σε μορφή MLA (8th εκδ.)Vocational and Industrial Training Board. VITB News. Vocational and Industrial Training Board.
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