APA (7th ed.) Citation

National council of teachers of mathematics Sturmabteilung, National Council of teachers of mathematics U. S. A., & Velasco Coba, F. (1972). El sistema de los enteros. Editorial Trillas.

Chicago Style (17th ed.) Citation

National council of teachers of mathematics Sturmabteilung, National Council of teachers of mathematics U. S. A., and Federico Velasco Coba. El Sistema De Los Enteros. México: Editorial Trillas, 1972.

MLA (9th ed.) Citation

National council of teachers of mathematics Sturmabteilung, et al. El Sistema De Los Enteros. Editorial Trillas, 1972.