Cita APA (7th ed.)

Elevator World (Firm). Educational Division. (1990). Elevator world educational package and reference library. Elevator World, Educational Division.

Cita Chicago (17th ed.)

Elevator World (Firm). Educational Division. Elevator World Educational Package and Reference Library. Mobile, AL (P.O. Box 6507, Loop Branch, Mobile 36606): Elevator World, Educational Division, 1990.

Cita MLA (8th ed.)

Elevator World (Firm). Educational Division. Elevator World Educational Package and Reference Library. Elevator World, Educational Division, 1990.