Não informado. (1918). Monthly Labor Review. Department of Labour, Bureau of Labor Statistics.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Monthly Labor Review. Washington: Department of Labour, Bureau of Labor Statistics, 1918.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Monthly Labor Review. Department of Labour, Bureau of Labor Statistics, 1918.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.