Παραπομπή APA

Kaku, M. (2005). Parallel worlds: The science of alternative universes and our future in the cosmos. Penguin.

Παραπομπή Chicago Style

Kaku, Michio. Parallel Worlds: The Science of Alternative Universes and Our Future in the Cosmos. London: Penguin, 2005.

Παραπομπή MLA

Kaku, Michio. Parallel Worlds: The Science of Alternative Universes and Our Future in the Cosmos. Penguin, 2005.