Gaya APA
Petersen, William. (1971).
Population / by William Petersen (2nd Ed.).
:
London : The Macmillan Company.
Gaya Chicago
Petersen, William.
Population / by William Petersen.
2nd Ed.
:
London : The Macmillan Company,
1971.
Buku.
Gaya MLA
Petersen, William.
Population / by William Petersen.
2nd Ed.
:
London : The Macmillan Company,
1971.
Buku.
Gaya Turabian
Petersen, William.
Population / by William Petersen.
2nd Ed.
:
London : The Macmillan Company,
1971.
Buku.