Gaya APA
Carrington, R. (1958).
A guide to earth history, illustr.by M.Wilson,(repr.) Tjet.pertama 1956. .
Harmondsworth:
Penguin.
Gaya MLA
Carrington, Richard..
"A guide to earth history, illustr.by M.Wilson,(repr.) Tjet.pertama 1956. ".
Harmondsworth:
Penguin,
1958.
Buku.