Cita APA (7th ed.)

Ball, J. E. (1980). Practical problems in mathematics for mason. Delmar.

Cita Chicago (17th ed.)

Ball, John E. Practical Problems in Mathematics for Mason. Albany, NY: Delmar, 1980.

Cita MLA (9th ed.)

Ball, John E. Practical Problems in Mathematics for Mason. Delmar, 1980.