By Gardon Alexander

Published by Barnes & Boble Co., 1961

By Ruth Bernstein and Stephen Bernstein

Published by McGraw-Hill book company, 1989

By Brother H Chalres

Published by The Bruce Publishing Co., 1956

By Lam Peng Kwan, Eric Y K Lam

Published by Federal Publications, 2002

By Lam Peng Kwan, Eric Y K Lam

Published by Federal Publications, 2002

By B.S.Beckett

Published by Oxford University Press, 1988

By M.B.V.Roberts

Published by Thomas Nelson and Sons Ltd/, 1986

By Brother H.Charles

Published by The Bruce Publiching co., 1965

By Jan A. Pechenik

Published by McGraw Hill, 2000

By M.D.Robson, .G.Morgan

Published by Macmillan Education, 1986