NASA SP-4205. Washington, D.C.: U.S. Government Printing Office, 1979.

Burroughs, William E.

Deep Black: Space Espionage and National Security.

New York: Random House, 1986.

Carpenter, M. Scott, et al.

We Seven.

New York: Simon and Schuster, 1962.

Chaikin, Andrew.

A Man on the Moon.

New York: Viking, 1994.

Shafi da ba'a sani ba