APA (7th ed.) Citation

Ballmann, W. (1995). Lectures on spaces of nonpositive curvature. Birkhauser.

Chicago Style (17th ed.) Citation

Ballmann, Werner. Lectures on Spaces of Nonpositive Curvature. Basel ; : Boston: Birkhauser, 1995.

MLA (9th ed.) Citation

Ballmann, Werner. Lectures on Spaces of Nonpositive Curvature. Birkhauser, 1995.

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