Παραπομπή APA

Pitchford, J. (1974). Population in Economic Growth. North Holland Publishing company.

Παραπομπή Chicago Style

Pitchford, J.D. Population in Economic Growth. Amsterdam: North Holland Publishing company, 1974.

Παραπομπή MLA

Pitchford, J.D. Population in Economic Growth. North Holland Publishing company, 1974.