Παραπομπή σε μορφή APA (7η εκδ.)

Lloyd, C. (2009). What on Earth happened? ... in brief: The planet, life and people from the big bang to the present day. Bloomsbury.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Lloyd, Christopher. What on Earth Happened? ... in Brief: The Planet, Life and People from the Big Bang to the Present Day. London: Bloomsbury, 2009.

Παραπομπή σε μορφή MLA (8th εκδ.)

Lloyd, Christopher. What on Earth Happened? ... in Brief: The Planet, Life and People from the Big Bang to the Present Day. Bloomsbury, 2009.