O' Hagan, J. W., & John, A. A. (1981). The economic significance of tourism within the European community: A fourth report by the working group of the National Tourist Organization of the EEC. BTA.
Chicago Style (17th ed.) CitationO' Hagan, John William, and A. A. John. The Economic Significance of Tourism Within the European Community: A Fourth Report by the Working Group of the National Tourist Organization of the EEC. London: BTA, 1981.
MLA (9th ed.) CitationO' Hagan, John William, and A. A. John. The Economic Significance of Tourism Within the European Community: A Fourth Report by the Working Group of the National Tourist Organization of the EEC. BTA, 1981.
Warning: These citations may not always be 100% accurate.