APA (7th ed.) Citation

KOTHNY, E., & KREKELER, K. (1945). Combustibles y aceites. Labor.

Chicago Style (17th ed.) Citation

KOTHNY, Erdmann, and Karl KREKELER. Combustibles Y Aceites. Barcelona: Labor, 1945.

MLA (9th ed.) Citation

KOTHNY, Erdmann, and Karl KREKELER. Combustibles Y Aceites. Labor, 1945.

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