APA (7th ed.) Citation

Lipsius-Sapper & Sánchez Barrado, M. (1931). Filosofia natural. Labor.

Chicago Style (17th ed.) Citation

Lipsius-Sapper and Moisés Sánchez Barrado. Filosofia Natural. Barcelona: Labor, 1931.

MLA (9th ed.) Citation

Lipsius-Sapper and Moisés Sánchez Barrado. Filosofia Natural. Labor, 1931.

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