Mohamad Iksan Fauzi
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2015
UI - Skripsi Membership
Cohn, Elizabeth Gross
W.B. Saunders, 2002
Buku Teks
West, Jessamyn
Harcourt, Brace, 1957
Buku Teks
Eckbo, Garrett
McGraw-Hill, 1969
Buku Teks
Kreller, Susan
Putnam's Sons, an imprint of Penguin Group , 2015
Buku Teks