Cita APA (7th ed.)

Lumsden, K. G. (1967). New developments in the teaching of economics. Prentice-Hall.

Cita Chicago (17th ed.)

Lumsden, Keith G. New Developments in the Teaching of Economics. New Jersey: Prentice-Hall, 1967.

Cita MLA (9th ed.)

Lumsden, Keith G. New Developments in the Teaching of Economics. Prentice-Hall, 1967.