APA (7th ed.) Citation

Thomälen, A., Planell, F., & Barrau, E. (1924). Electrotecnia. Labor.

Chicago Style (17th ed.) Citation

Thomälen, Adolfo, Francisco Planell, and Eduardo Barrau. Electrotecnia. Barcelona: Labor, 1924.

MLA (9th ed.) Citation

Thomälen, Adolfo, et al. Electrotecnia. Labor, 1924.