APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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