Gordon, Gary
John Wiley & Sons, 1995
Buku Teks SO
Chairunnisa Luthfya Nurifana
Fakultas Teknik Universitas Indonesia, 2019
UI - Skripsi Membership
Cornell, Jane
Creative Homeowner Press, 1996
Buku Referensi
Nadya Syafira
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2016
UI - Skripsi Membership
Johnson, Glenn M.
McGraw-Hill, 1999
Buku Referensi