Gaya APA
Ley, Willy. (1954).
Engineers' dreams .
New York:
The Viking Press.
Gaya Chicago
Ley, Willy.
Engineers' dreams.
New York:
The Viking Press,
1954.
Text.
Gaya MLA
Ley, Willy.
Engineers' dreams.
New York:
The Viking Press,
1954.
Text.
Gaya Turabian
Ley, Willy.
Engineers' dreams.
New York:
The Viking Press,
1954.
Print.