Dwi Usman Saputra, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2012
UI - Skripsi (Open)
Simbolon, Rio B. Purba, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2013
UI - Tesis (Membership)
Nash, Frederick C.
McGraw-Hill, 1985
Buku Teks
Crouse, William H., author
Vantage Art.Inc, 1984
Buku Teks
Crouse, William H., author
McGraw-Hill, 1980
Buku Teks