APA

Hills K., Neill C. & Pitchford R. (1993). World History. London: Kingfisher.

Chicago

Hills Ken, Neill Cynthia and Pitchford Ralph. 1993. World History. London: Kingfisher.

Harvard

Hills K., Neill C. and Pitchford R. (1993). World History. London: Kingfisher.

MLA

Hills Ken, Neill Cynthia and Pitchford Ralph. World History. London: Kingfisher. 1993.