London , Heineman. 1976.

London, Heinemann 1976

London, Heinemann 1970

London, Heinemann 1978

London, Heinemann 1971.

London, Heinemann 1974. 1974.

London - Ibadan - Nairobi, Heinemann 1971. 1971.

London - Ibadan - Nairobi, Heinemann 1977. 1977.

1979

London : Heinemann Educational, 1979.

London, Heinemann Educational Books, 1973.

Athens-London, Ekdotike Athenon s.a. - Heinemann. 1975

London - Nairobi - Ibadan - Lusaka, Heinemann 1974. 1974.

London, Heinemann Educational Books Ltd. 1972

1970

Heinemann, London 1970