APA (7th ed.) Citation

Heckel, W., & Tritle, L. A. (2003). Crossroads of history: The Age of Alexander. Regina Books.

Chicago Style (17th ed.) Citation

Heckel, Waldemar, and Lawrence A. Tritle. Crossroads of History: The Age of Alexander. Claremont, Calif.: Regina Books, 2003.

MLA (9th ed.) Citation

Heckel, Waldemar, and Lawrence A. Tritle. Crossroads of History: The Age of Alexander. Regina Books, 2003.