Nichols, Herbert L.
McGraw-Hill, 2010
Buku Teks
Nichols, Herbert L.
McGraw-Hill, 1976
Buku Referensi
Church, Horace K.
McGraw-Hill, 1981
Buku Referensi
Wauchope, Robert
The University of Chicago Press, 1965
Buku Teks
Danang Adhi Prakosa
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2020
UI - Skripsi Membership