Ehrlich, J. W., author
Oceana Publications, 1962
Buku Teks
Ricka Putri Suteja, author
2020
UI - Makalah dan Kertas Kerja
Cook, Stanley
Penguin Book, 1945
Buku Teks
Stevenson, Burton, author
New York, Harper & Brothers
Buku Referensi
Walter A. Elwell, general editor
Baker Book House, 1995
Buku Referensi