Kragh, H. (2015). Masters of the Universe: Conversations with cosmologists of the past (1-st ed.). Oxford University Press.

Kragh, Helge. Masters of the Universe: Conversations with Cosmologists of the Past. 1-st ed. Oxford: Oxford University Press, 2015.

Kragh, Helge. Masters of the Universe: Conversations with Cosmologists of the Past. 1-st ed. Oxford University Press, 2015.