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.