APA (7th ed.) Citation

U. S. Employment Service. (1949). Dictionary of occupational titles. Govt. Print. Off.

Chicago Style (17th ed.) Citation

U. S. Employment Service. Dictionary of Occupational Titles. Washington: Govt. Print. Off, 1949.

MLA (9th ed.) Citation

U. S. Employment Service. Dictionary of Occupational Titles. Govt. Print. Off, 1949.

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