APA-referens (7:e uppl.)

Nicolson, I. (1995). The universe (2nd ed. rev.and updated.). Horus.

Chicago-referens (17:e uppl.)

Nicolson, Iain. The Universe. 2nd ed. rev.and updated. London: Horus, 1995.

MLA-referens (9:e uppl.)

Nicolson, Iain. The Universe. 2nd ed. rev.and updated. Horus, 1995.