Cita APA (7th ed.)

Hoover, R. E. (1984). Executive's guide to online information services. Knowledge Industry Publications.

Cita Chicago (17th ed.)

Hoover, Ryan E. Executive's Guide to Online Information Services. White Plains, N.Y: Knowledge Industry Publications, 1984.

Cita MLA (9th ed.)

Hoover, Ryan E. Executive's Guide to Online Information Services. Knowledge Industry Publications, 1984.