Sagala, Arold Lambok Leondy
Fakultas Hukum Universitas Indonesia , 2016
UI - Skripsi Membership
Maria Anastasya
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2011
UI - Skripsi Open
Trifoni, Jasmina
White Star Publishers, 2013
Buku Referensi
Price, Willard
John Day, 1954
Buku Teks SO
collected and edited by Charles Neider
Harper, 1954
Buku Teks SO