Gaya APA
Ley, Willy. (1958).
Satellite, Rockets and outer Space .
New York:
Signet Key Books.
Gaya Chicago
Ley, Willy.
Satellite, Rockets and outer Space.
New York:
Signet Key Books,
1958.
Text.
Gaya MLA
Ley, Willy.
Satellite, Rockets and outer Space.
New York:
Signet Key Books,
1958.
Text.
Gaya Turabian
Ley, Willy.
Satellite, Rockets and outer Space.
New York:
Signet Key Books,
1958.
Print.