Cita APA (7th ed.)
Paddock, J. Origin of the Mesoamerican 260-day calendar.
Cita Chicago (17th ed.)
Paddock, John. Origin of the Mesoamerican 260-day Calendar.
Cita MLA (9th ed.)
Paddock, John. Origin of the Mesoamerican 260-day Calendar.
Atenció: Aquestes cites poden no estar 100% correctes.