Kim, Ji Ha
Kim Ji-Ha Jeonjib.1-3 = 김지하 전집. 1-3
Silcheon Munhaksa, 2002
 Buku Teks
Timotius Kurniawan
Respect for nature sebagai tolak ukur individu dalam mengelola alam pada era modern = Respect for nature as a measure of an individual in managing nature in the modern era
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2012
 UI - Skripsi Open
Koren, Henry J.
An introduction to the philosophy of nature
Duquesne University, 1960
 Buku Teks SO
Niebuhr, Reinhold
The nature and destiny of man
Charles Scribners Sons, 1945
 Buku Teks SO
Chu, Hsi
The Philosophy of human nature
Probsthain, 1922
 Buku Teks SO