Hansen, Helen F.
W.B. Saunders Company, 1947
Buku Teks
Geraldine Mustika Ayu, author
2017
UI - Skripsi (Membership)
Fenner, M. Kathleen
D. Van Nostrand Comp., 1980
Buku Teks
Griffith, Richard, author
Learning matters Ltd., 2008
Buku Teks
Lippincott , 2004
Buku Teks