Villanueva, Buenaventure M
University of the Philippina, 1959
Buku Teks
Vargas, Robert, author
Oxford University Press, 2016
eBooks
Masamichi Sasaki, editor
Brill, 1998
Buku Teks
Hampden-Turner, Charles M.
John Wiley & Sons, 2000
Buku Teks
Tuan, Yi-fu
Columbia University, 1990
Buku Teks