APA (7th ed.) Citation

Heinle, E., & Leonhardt, F. (1989). Towers: A historical survery. Butterwrth architecture.

Chicago Style (17th ed.) Citation

Heinle, Ervin, and Fritz Leonhardt. Towers: A Historical Survery. London: Butterwrth architecture, 1989.

MLA (8th ed.) Citation

Heinle, Ervin, and Fritz Leonhardt. Towers: A Historical Survery. Butterwrth architecture, 1989.

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