Tribe, Laurence H.
Abortion the clash of absolutes
W.W.Norton & Company, 1990
 Buku Teks
Ross, H. Laurence (Hugh Laurence)
Perspectives on the social order: readings in sociology / H. Laurence Ross
McGraw-Hill, 1963
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Burnison, Gary, 1961-
The twelve absolutes of leadership
McGraw-Hill, 2012
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Jefferson, D.W.
Laurence Sterne
London Longmans 1954
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Population : a clash of prophets
edited by Edward Pohlman
New American Library, 1973
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