APA (7th ed.) Citation

(1971). Directory of labor unions. Labor Statistics Service, Dept. of Labor.

Chicago Style (17th ed.) Citation

Directory of Labor Unions. Manila: Labor Statistics Service, Dept. of Labor, 1971.

MLA (9th ed.) Citation

Directory of Labor Unions. Labor Statistics Service, Dept. of Labor, 1971.

Warning: These citations may not always be 100% accurate.