Graham D. Burrows, Robb O. Stanley, Peter B. Bloom
John Wiley & Sons, 2001
Buku Teks
Gauld, Alan
Cambridge University Press, 1992
Buku Referensi
Imelda Yanti
Fakultas Ilmu Keperawatan Universitas Indonesia, 2013
UI - Tesis Membership
Keeton, Joe
Hale , 1989
Buku Teks
Ihlus Fardan
2018
UI - Tugas Akhir