Gaya APA
The physical universe. (1967).
New York:
Mc Graw-Hill.
Gaya Chicago
The physical universe.
2.
New York:
Mc Graw-Hill,
1967.
Buku.
Gaya MLA
The physical universe.
2.
New York:
Mc Graw-Hill,
1967.
Buku.
Gaya Turabian
The physical universe.
New York:
Mc Graw-Hill,
1967.
Buku.