APA (7th ed.) Citation

Stammbach, U. (2012). A letter of Hermann Amandus Schwarz on isoperimetric problems.

Chicago Style (17th ed.) Citation

Stammbach, Urs. A Letter of Hermann Amandus Schwarz on Isoperimetric Problems. 2012.

MLA (9th ed.) Citation

Stammbach, Urs. A Letter of Hermann Amandus Schwarz on Isoperimetric Problems. 2012.

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