APA (7th ed.) Citation

Heinle, E., & Leonhardt, F. (1989). Towers : a historical survey / Erwin Heinle, Fritz Leonhardt: A historical survey. Butterworth Architecture.

Chicago Style (17th ed.) Citation

Heinle, Erwin, and Fritz Leonhardt. Towers : A Historical Survey / Erwin Heinle, Fritz Leonhardt: A Historical Survey. London: Butterworth Architecture, 1989.

MLA (9th ed.) Citation

Heinle, Erwin, and Fritz Leonhardt. Towers : A Historical Survey / Erwin Heinle, Fritz Leonhardt: A Historical Survey. Butterworth Architecture, 1989.

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