Singer Building
- Foundations for the New Singer Building, New York City. Dans: Transactions of the American Society of Civil Engineers, v. 63, n. 2 (juin 1909), pp. 1-20. (1909):
- Türme aller Zeiten - aller Kulturen. 3ème édition, Deutsche Verlags-Anstalt, Stuttgart (Allemagne), pp. 298. (1997):