HORUS EDITIONS. (2002). THE ULTIMATE HOW IT WORKS ENCYCLOPEDIA. HORUS EDITIONS.
Cita Chicago Style (17a ed.)HORUS EDITIONS. THE ULTIMATE HOW IT WORKS ENCYCLOPEDIA. HORUS EDITIONS, 2002.
Cita MLA (9a ed.)HORUS EDITIONS. THE ULTIMATE HOW IT WORKS ENCYCLOPEDIA. HORUS EDITIONS, 2002.
Precaución: Estas citas no son 100% exactas.