Gaya APA
The Scientific Outlook. (1969).
New York:
W.W Norton & Company.
Gaya Chicago
The Scientific Outlook.
.
New York:
W.W Norton & Company,
1969.
Buku.
Gaya MLA
The Scientific Outlook.
.
New York:
W.W Norton & Company,
1969.
Buku.
Gaya Turabian
The Scientific Outlook.
New York:
W.W Norton & Company,
1969.
Buku.