Παραπομπή APA

Panek, R. (2011). The 4 percent universe: Dark matter, dark energy, and the race to discover the rest of reality. Boston: Houghton Mifflin Harcourt.

Παραπομπή Chicago Style

Panek, Richard. The 4 Percent Universe: Dark Matter, Dark Energy, and the Race to Discover the Rest of Reality. Boston: Houghton Mifflin Harcourt, 2011.

Παραπομπή MLA

Panek, Richard. The 4 Percent Universe: Dark Matter, Dark Energy, and the Race to Discover the Rest of Reality. Boston: Houghton Mifflin Harcourt, 2011.

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