WILLIAMS, K. W. (1970). Arithmetic: A semiprogrammed text. Prentice-Hall.
Citación estilo ChicagoWILLIAMS, Keith W. Arithmetic: A Semiprogrammed Text. Englewood Cliffs, N.J: Prentice-Hall, 1970.
Cita MLAWILLIAMS, Keith W. Arithmetic: A Semiprogrammed Text. Prentice-Hall, 1970.
Warning: These citations may not always be 100% accurate.