APA (7th ed.) Citation

Nikūʼī Ṣadrī, B. (2021). The geotourism industry in the 21st century: The origin, principles, and futuristic approach. Apple Academic Press.

Chicago Style (17th ed.) Citation

Nikūʼī Ṣadrī, Bahrām. The Geotourism Industry in the 21st Century: The Origin, Principles, and Futuristic Approach. Burlington, ON, Canada: Apple Academic Press, 2021.

MLA (9th ed.) Citation

Nikūʼī Ṣadrī, Bahrām. The Geotourism Industry in the 21st Century: The Origin, Principles, and Futuristic Approach. Apple Academic Press, 2021.