Rogers, G.F.C. (Gordon Frederick Crichton), author
ELBS and Longmann, 1970
Buku Teks
Rogers, G.F.C. (Gordon Frederick Crichton), author
Longmans, 1967
Buku Teks
Roberts, J.K., author
ELBS, 1962
Buku Teks
Zemansky, Mark W. (Mark Waldo), 1900-, author
McGraw-Hill, 1957
Buku Teks
Balzhiser, Richard E., author
Prentice Hall of India, 1977
Buku Teks