APA (7th ed.) Citation

Krebs, N. (1931). Geografía humana. Labor.

Chicago Style (17th ed.) Citation

Krebs, Norbert. Geografía Humana. Barcelona: Labor, 1931.

MLA (9th ed.) Citation

Krebs, Norbert. Geografía Humana. Labor, 1931.

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