APA (7th ed.) Citation

Lundberg, D. E., & Lundberg, C. International travel and tourism (2nd ed.).

Chicago Style (17th ed.) Citation

Lundberg, Donald E., and Carolyn Lundberg. International Travel and Tourism. 2nd ed.

MLA (9th ed.) Citation

Lundberg, Donald E., and Carolyn Lundberg. International Travel and Tourism. 2nd ed.

Warning: These citations may not always be 100% accurate.