Pitchford, Paul
North Atlantic Books, 2002
Buku Teks SO
Bakhru
Pashupati Printers, 2017
Buku Teks SO
Werbach, Melvyn R.
Thorsons, 1993
Buku Referensi
A. Catherine Ross, Benjamin Caballero, Robert J. Cousins, Katherine L. Tucker, Thomas R. Ziegler, editors
Lippincott Williams & Wilkins, 2014
Buku Teks SO
Balch, Phyllis A.
Avery, 2006
Buku Teks SO