APA (7th ed.) Citation

Siemens, G., Prado, E., & López Morales, J. (1956). Historia de la Casa Siemens. Karl Alber.

Chicago Style (17th ed.) Citation

Siemens, Georg, Eduardo Prado, and Julio López Morales. Historia De La Casa Siemens. Freiburg [etc.]: Karl Alber, 1956.

MLA (9th ed.) Citation

Siemens, Georg, et al. Historia De La Casa Siemens. Karl Alber, 1956.

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