Gaya APA
Butterworth, W.E.. (1964).
The Wonders of astronomy .
New York:
G.P. Putnam`s.
Gaya Chicago
Butterworth, W.E..
The Wonders of astronomy.
New York:
G.P. Putnam`s,
1964.
Text.
Gaya MLA
Butterworth, W.E..
The Wonders of astronomy.
New York:
G.P. Putnam`s,
1964.
Text.
Gaya Turabian
Butterworth, W.E..
The Wonders of astronomy.
New York:
G.P. Putnam`s,
1964.
Print.