APA (7th ed.) Zitazioa
Rickards, C. G. (1939). An Interpretation of the Mexican Year Sign as a Life Symbol. Instituto Nacional de Antropología e Historia.
Chicago Style (17th ed.) Zitazioa
Rickards, Constantine George. An Interpretation of the Mexican Year Sign as a Life Symbol. México: Instituto Nacional de Antropología e Historia, 1939.
MLA (9th ed.) Zitazioa
Rickards, Constantine George. An Interpretation of the Mexican Year Sign as a Life Symbol. Instituto Nacional de Antropología e Historia, 1939.
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