O'Hagan, J. W., & Minnock, C. (1983). The economic significance of tourism within the European community: A fifth report by the working group of the National Tourist Organization of the EEC. For the Working Group by the British Tourist Authority.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)O'Hagan, John William, و C.M Minnock. The Economic Significance of Tourism Within the European Community: A Fifth Report by the Working Group of the National Tourist Organization of the EEC. [S.l.]: For the Working Group by the British Tourist Authority, 1983.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)O'Hagan, John William, و C.M Minnock. The Economic Significance of Tourism Within the European Community: A Fifth Report by the Working Group of the National Tourist Organization of the EEC. For the Working Group by the British Tourist Authority, 1983.