Παραπομπή σε μορφή APA (7η εκδ.)

Edgell, D. L. (1987). International tourism prospects 1987 - 2000: An agenda for managers and executive. US Department of Commerce. US Travel and Tourism Administration.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Edgell, David L. International Tourism Prospects 1987 - 2000: An Agenda for Managers and Executive. Washington D.C: US Department of Commerce. US Travel and Tourism Administration, 1987.

Παραπομπή σε μορφή MLA (9th εκδ.)

Edgell, David L. International Tourism Prospects 1987 - 2000: An Agenda for Managers and Executive. US Department of Commerce. US Travel and Tourism Administration, 1987.