Gralley, J. (1999). Hogula, dread pig of night. Holt.
Cita Chicago Style (17a ed.)Gralley, Jean. Hogula, Dread Pig of Night. New York: Holt, 1999.
Cita MLA (8a ed.)Gralley, Jean. Hogula, Dread Pig of Night. Holt, 1999.
Precaución: Estas citas no son 100% exactas.