APA (7th ed.) Citation

Goeldner, C. R., Duea, K., & Sletta, Y. (1973). Travel trends in the United States and Canada. Business Research Division, University of Colorado.

Chicago Style (17th ed.) Citation

Goeldner, Charles R., Karen Duea, and Yvonne Sletta. Travel Trends in the United States and Canada. Boulder,: Business Research Division, University of Colorado, 1973.

MLA (8th ed.) Citation

Goeldner, Charles R., et al. Travel Trends in the United States and Canada. Business Research Division, University of Colorado, 1973.