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Lua i Stíl Chicago (17ú heag.)Guallpa Guallpa, Milton Patricio, agus Sergio Constantino Ochoa Encalada. Cornish: Suicide Behaviors in the Teens of the Tenth Grade of Basic Education. Corporación Universitaria Americana, 2019.
Lua MLA (8ú heag.)Guallpa Guallpa, Milton Patricio, agus Sergio Constantino Ochoa Encalada. Cornish: Suicide Behaviors in the Teens of the Tenth Grade of Basic Education. Corporación Universitaria Americana, 2019.
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