APA (7e ed.) Bronvermelding

GILL, R. T. (1967). Economic development: Past and present. Prentice-Hall.

Chicago (17e ed.) Bronvermelding

GILL, Richard T. Economic Development: Past and Present. New Jersey: Prentice-Hall, 1967.

MLA (9e ed.) Bronvermelding

GILL, Richard T. Economic Development: Past and Present. Prentice-Hall, 1967.