Hubbard, L. Ron, 1911-1986, author
Hermitage House, 1950
Buku Teks
Claringbull, Norman, author
Learning Matters, 2011
Buku Teks
Hasibuan, Shinta Yuliana, author
Fakultas Ilmu Keperawatan Universitas Indonesia, 2022
UI - Tugas Akhir
Hubbard, L. Ron, 1911-1986, author
Hermitage House, 1950
Buku Referensi
John Wiley & Sons, 1983
Buku Teks