Pearl, Richard M.
McGraw-Hill, 1955
Buku Teks
Millis, Walter
William Morrow & Company, 1947
Buku Teks
Berney, Maurice
Angus and Robertson, 1965
Buku Teks
Waldo Eduard Bansaleng Bogar, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1992
UI - Skripsi (Membership)
Berbar, Halim, author
Times Editions-Marshall Cavendish, 2004
Buku Referensi