APA Citation

Spencer, D. H., & Spencer, D. H. (1970). Question-words. London, Sydney: Longman.

Chicago Style Citation

Spencer, Duncan Hugh, and Duncan Hugh Spencer. Question-words. London, Sydney: Longman, 1970.

MLA Citation

Spencer, Duncan Hugh, and Duncan Hugh Spencer. Question-words. London, Sydney: Longman, 1970.

Warning: These citations may not always be 100% accurate.