Artikel Jurnal
Putu Diana Saraswati, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2020
UI - Skripsi (Membership)
New York : Saturday Review of Literature Company
Majalah, Jurnal, Buletin
Garrard, Judith, author
Jones & Bartlett Learning, 2011
Buku Teks
Sturney, S.G.
Longmans, Green and Co. , 1959
Buku Teks