APA (7th ed.) Citation

(1981). LIBGIS--Public Library Universe (1981) Data File [machine-readable data file].

Chicago Style (17th ed.) Citation

LIBGIS--Public Library Universe (1981) Data File [machine-readable Data File]. 1981.

MLA (9th ed.) Citation

LIBGIS--Public Library Universe (1981) Data File [machine-readable Data File]. 1981.

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