Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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

Precaución: Estas citas no son 100% exactas.