Symon, Keith R.
Addison-Wesley, 1971
Buku Teks
Sitepu, Sri Rosma Kencana
Fakultas Ilmu Keperawatan Universitas Indonesia, 2023
UI - Tesis Membership
Williams, Jan R.
Harcourt brace jovannovich, Publishers , 1989
Buku Teks
Twain, Mark, 1835-1910
Kepustakaan Populer Gramedia, 2016
Buku Teks
Twain, Mark, 1835-1910
Random House, 1991
Buku Referensi