APA (7th ed.) Citation

U. S. Employment Service. (1966). Occupations in the field of library science. [U. S. Govt. Print. Off.].

Chicago Style (17th ed.) Citation

U. S. Employment Service. Occupations in the Field of Library Science. [Washington]: [U. S. Govt. Print. Off.], 1966.

MLA (9th ed.) Citation

U. S. Employment Service. Occupations in the Field of Library Science. [U. S. Govt. Print. Off.], 1966.