Cita APA (7th ed.)

ebrary, Inc, Greenberg, J. S., & Hertzfeld, H. (1992). Space economics. American Institute of Aeronautics and Astronautics.

Cita Chicago (17th ed.)

ebrary, Inc, Joel S. Greenberg, i Henry Hertzfeld. Space Economics. Washington, D.C.: American Institute of Aeronautics and Astronautics, 1992.

Cita MLA (9th ed.)

ebrary, Inc, et al. Space Economics. American Institute of Aeronautics and Astronautics, 1992.