Salman Rashid, author
Sang-E-Meel Publications, 2005
Buku Referensi
Ayu Dwi Astuti, author
Sekolah Ilmu Lingkungan Universitas Indonesia, 2023
UI - Tesis (Membership)
Wilber, Ken, author
Shambhala, 1996
Buku Teks
Frank, Morris
Kingswood The World's Work 1913
Buku Teks
Roland, Betty, author
Hale & Iremonger, 1984
Buku Teks