APA (7th ed.) Citation

Spigai, F. G., & ERIC Clearinghouse on Library and Information Sciences. (1973). The invisible medium: The state of the art of microform and a guide to the literature. ERIC Clearinghouse on Library and Information Sciences.

Chicago Style (17th ed.) Citation

Spigai, Frances G., and ERIC Clearinghouse on Library and Information Sciences. The Invisible Medium: The State of the Art of Microform and a Guide to the Literature. Washington: ERIC Clearinghouse on Library and Information Sciences, 1973.

MLA (8th ed.) Citation

Spigai, Frances G., and ERIC Clearinghouse on Library and Information Sciences. The Invisible Medium: The State of the Art of Microform and a Guide to the Literature. ERIC Clearinghouse on Library and Information Sciences, 1973.

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