Austin, Richard L.
Van Nostrand Reinhold, 1983
Buku Teks
Austin, Richard L.
Van Nostrand Reinhold, 1984
Buku Teks SO
edited by Simon Bell, Ingrid Sarlov Herlin, Richard Stiles
Routledge, 2012
Buku Teks SO
Crockett, James Underwood
Time-life Books, 1975
Buku Teks SO
Simonds, John Ormsbee
McGraw-Hill, 1961
Buku Teks SO