Asperheim, Mary Kaye
W.B. Saunders, 1968
Buku Teks SO
Asperheim, Mary Kaye
W.B. Saunders, 1973
Buku Teks SO
Vallerand, April Hazard
F.A.Davis Company, 2014
Buku Teks SO
Hansen, Helen F.
W.B. Saunders Company, 1947
Buku Teks
Rodman, Morton J.
J.B. Lippincott, 1968
Buku Teks