APA (7th ed.) Citation

Speidel, M., & Dyroff, H. (1988). Art Nouveau, Jugendstil architecture in Europe.

Chicago Style (17th ed.) Citation

Speidel, Manfred, and Hans-Dieter Dyroff. Art Nouveau, Jugendstil Architecture in Europe. [Bonn], 1988.

MLA (9th ed.) Citation

Speidel, Manfred, and Hans-Dieter Dyroff. Art Nouveau, Jugendstil Architecture in Europe. 1988.

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