Cita APA (7th ed.)

Picken, D. K. (1923). The number system of arithmetic and algebra. Melbourne University Press.

Cita Chicago (17th ed.)

Picken, D. K. The Number System of Arithmetic and Algebra. Melbourne: Melbourne University Press, 1923.

Cita MLA (8th ed.)

Picken, D. K. The Number System of Arithmetic and Algebra. Melbourne University Press, 1923.