May, P. (2007). The fourth sacrifice (1st U.S. ed.). Thomas Dunne Books/St. Martin's Minotaur.
Cita Chicago Style (17a ed.)May, Peter. The Fourth Sacrifice. 1st U.S. ed. New York: Thomas Dunne Books/St. Martin's Minotaur, 2007.
Cita MLA (8a ed.)May, Peter. The Fourth Sacrifice. 1st U.S. ed. Thomas Dunne Books/St. Martin's Minotaur, 2007.
Precaución: Estas citas no son 100% exactas.