Ember, Carol R.
Prentice-Hall, 1985
Buku Teks
Haviland, William A.
Rinehart and Winston, 1974
Buku Teks
Rahner, Karl
The Crossroad Publishing Company, 1981
Buku Referensi
Ahmad Fadlan Awriya
Fakultas Teknik Universitas Indonesia, 2019
UI - Tugas Akhir
Descrates, Rene
J.M. Dent & Sons , 1949
Buku Teks