Gaya APA

Bergamini, D, O, T, E, O, L. (-1964). The universe, (popular ed.). - Life nature library. Tjet. pertama 1962. . Tt: Time-life International.

Gaya MLA

Bergamini, D., Of, The, Editors, Of, Life.. "The universe, (popular ed.). - Life nature library. Tjet. pertama 1962. ". Tt: Time-life International, -1964. Buku.