Gaya APA
Scientic american, volume 232. (1975).
New York:
Monthly.
Gaya Chicago
Scientic american, volume 232.
text.
New York:
Monthly,
1975.
Tesis.
Gaya MLA
Scientic american, volume 232.
text.
New York:
Monthly,
1975.
Tesis.
Gaya Turabian
Scientic american, volume 232.
New York:
Monthly,
1975.
Tesis.