"Clinical Chemistry and Laboratory Medicine", 19.12 (1981): 1153-1216. Retrieved 19 May. 2013, from http://www.degruyter.com/view/j/cclm.1981.19.issue-12/issue-files/cclm.1981.19.issue-12.xml

Clinical Chemistry and Laboratory Medicine (1981), 19(12), pp. 1153-1216. Retrieved 19 May. 2013, from http://www.degruyter.com/view/j/cclm.1981.19.issue-12/issue-files/cclm.1981.19.issue-12.xml

Clinical Chemistry and Laboratory Medicine. 1981. 19(12): 1153-1216. Retrieved 19 May. 2013, from http://www.degruyter.com/view/j/cclm.1981.19.issue-12/issue-files/cclm.1981.19.issue-12.xml