Cita APA (7th ed.)

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.

Cita Chicago (17th ed.)

O' Hagan, John William, i 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.

Cita MLA (9th ed.)

O' Hagan, John William, i 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.