Trawick, Buckner B., author
Barnes & Noble, 1955
Buku Teks
Troxel, Ronald L., author
Wiley-Blackwell, 2012
Buku Teks
Currency Press, 1984
Buku Teks
Yi Kwang-su, author
UI-Press, 2014
Buku Teks
edited by Angel Aparicio and Estrella S. Majuelo
University of Santo Tomas, 2015
Buku Referensi