APA-referens (7:e uppl.)

Institute of Vocational Training and Development. Information and Documentation Services. Catalogue of training materials. Part 1-Print. National Manpower and Youth Council.

Chicago-referens (17:e uppl.)

Institute of Vocational Training and Development. Information and Documentation Services. Catalogue of Training Materials. Part 1-Print. Taguig: National Manpower and Youth Council.

MLA-referens (9:e uppl.)

Institute of Vocational Training and Development. Information and Documentation Services. Catalogue of Training Materials. Part 1-Print. National Manpower and Youth Council.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.