Cita APA

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

Citación estilo Chicago

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

Cita MLA

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