Cita APA

International Correspondence Schools, & International Correspondence Schools. (1949). Fractions: Prepared especially for home study (1. edition.). Great Britain: International Textbook Company.

Citación estilo Chicago

International Correspondence Schools, y International Correspondence Schools. Fractions: Prepared Especially for Home Study. 1. edition. Great Britain: International Textbook Company, 1949.

Cita MLA

International Correspondence Schools, y International Correspondence Schools. Fractions: Prepared Especially for Home Study. 1. edition. Great Britain: International Textbook Company, 1949.