Cita APA (7a ed.)

Colegio24hs. El Escepticismo. NetLibrary Incorporated.

Cita Chicago Style (17a ed.)

Colegio24hs. El Escepticismo. [Place of publication not identified]: NetLibrary Incorporated.

Cita MLA (9a ed.)

Colegio24hs. El Escepticismo. NetLibrary Incorporated.