APA (7th ed.) Citation

Boettcher, J. (1989). Xi'an.

Chicago Style (17th ed.) Citation

Boettcher, Jürgen. Xi'an. [S.l.], 1989.

MLA (9th ed.) Citation

Boettcher, Jürgen. Xi'an. 1989.

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