Hasya Lillah, author
2018
UI - Skripsi (Membership)
edited by David Brower
Sierra Club, 1961
Buku Teks
Stanley, Melissa, author
Addison-Wesley, 1984
Buku Teks
Ika Maylasari, author
Program Pascasarjana Universitas Indonesia, 2014
UI - Tesis (Membership)
Duffy, Karen G., author
Pearson Education, Inc., 2005
Buku Teks