Tollison, Robert D.
Lexington Books, 1991
Buku Teks
Ekelund, Robert B. Jr
Little, Brown & Co., 1986
Buku Teks
Whish, Richard, author
Oxford University Press, 2012
Buku Teks
Nabila Putriyandri Alifa, author
Fakultas Teknik Universitas Indonesia, 2014
UI - Skripsi (Membership)
Alfa Fauzia, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2012
UI - Skripsi (Open)