Cita APA (7a ed.)

(1927). Rapid arithmetic calculations: Mechanical practice and mental tests : for individual work & class tuition with answers. Humphrey Milford.

Cita Chicago Style (17a ed.)

Rapid Arithmetic Calculations: Mechanical Practice and Mental Tests : For Individual Work & Class Tuition with Answers. London: Humphrey Milford, 1927.

Cita MLA (9a ed.)

Rapid Arithmetic Calculations: Mechanical Practice and Mental Tests : For Individual Work & Class Tuition with Answers. Humphrey Milford, 1927.