Pountney, Laura
Polity Press , 2015
Buku Teks
Dove, Martina
Routledge, 2020
eBooks
Buchholz, Andreas
John Wiley & Sons, 2000
Buku Teks
Feinberg, Samuel
New York Fairchild Publications c.1960,
Buku Teks
Casson, Herbert N.
London The Efficiency Maya time [date of publication not identified],
Buku Teks