Gaya APA
Nature/Science annual. (1971).
New York:
Time-Life Books.
Gaya Chicago
Nature/Science annual.
.
New York:
Time-Life Books,
1971.
Buku.
Gaya MLA
Nature/Science annual.
.
New York:
Time-Life Books,
1971.
Buku.
Gaya Turabian
Nature/Science annual.
New York:
Time-Life Books,
1971.
Buku.