Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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