Cita APA

Ballance, D., & Ballance, H. (1969). Machines at work, lifting weights. Ginn.

Citación estilo Chicago

Ballance, Denis., and Helen Ballance. Machines At Work, Lifting Weights. London: Ginn, 1969.

Cita MLA

Ballance, Denis., and Helen Ballance. Machines At Work, Lifting Weights. London: Ginn, 1969.

Precaución: Estas citas no son 100% exactas.