Cita APA

Kononova U. A., Chiconina E. V., & Drozdetskaya O. V. (2011). The problems of worldwide tourism. 2011.

Citación estilo Chicago

Kononova U. A., Chiconina E. V., and Drozdetskaya O. V. The Problems of Worldwide Tourism. 2011, 2011.

Cita MLA

Kononova U. A., et al. The Problems of Worldwide Tourism. 2011, 2011.

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