Cita APA (7th ed.)

Howard, C. F., & Dumas, E. a. (1963). Basic procedures in teaching arithmetic: Instructor's manual. F. W. Heath & Co.

Cita Chicago (17th ed.)

Howard, Charles Frederick, i Enoch author Dumas. Basic Procedures in Teaching Arithmetic: Instructor's Manual. Boston, Massachusetts: F. W. Heath & Co, 1963.

Cita MLA (9th ed.)

Howard, Charles Frederick, i Enoch author Dumas. Basic Procedures in Teaching Arithmetic: Instructor's Manual. F. W. Heath & Co, 1963.