Boughey, Arthur S., author
McMillan Publisher, 1975
Buku Teks
Sopa Merim Pemere, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2013
UI - Skripsi (Membership)
Bennett, Charles F., author
John Wiley & Sons, 1975
Buku Teks
Brubaker, Sterling, author
A Mentor Book, 1972
Buku Teks
Volpe, E. Peter (Erminio Peter), author
W.C. Brown, 1975
Buku Teks