Keating, Sarah B
Lippincott Williams & Wilkins, 2006
Buku Teks SO
edited by Jane G. Zapka
Third Party Publishing, 1982
Buku Teks SO
Packer, Herbert L.
McGraw-Hill, 1973
Buku Teks SO
edited by Davis S. Miall
Clarendon Press, 1990
Buku Teks SO
Institute for Scientific co-coperation, [Date of publication not identified]
Majalah, Jurnal, Buletin