Cita APA (7th ed.)

McIntyre, G., Hetherington, A., & Inskeep, E. (1993). Sustainable tourism development: Guide for local planners. World Tourism Organization.

Cita Chicago (17th ed.)

McIntyre, George, Arlene Hetherington, i Edward Inskeep. Sustainable Tourism Development: Guide for Local Planners. Madrid, Spain: World Tourism Organization, 1993.

Cita MLA (9th ed.)

McIntyre, George, et al. Sustainable Tourism Development: Guide for Local Planners. World Tourism Organization, 1993.