Goeldner, C. R., & Duea, K. (1978). Travel trends in the United States and Canada (5. ed.). Univ. of Colorado, Graduate School of Business Administration.
Chicago-Zitierstil (17. Ausg.)Goeldner, Charles R., und Karen Duea. Travel Trends in the United States and Canada. 5. ed. Boulder, Colo: Univ. of Colorado, Graduate School of Business Administration, 1978.
MLA-Zitierstil (9. Ausg.)Goeldner, Charles R., und Karen Duea. Travel Trends in the United States and Canada. 5. ed. Univ. of Colorado, Graduate School of Business Administration, 1978.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.