APA استشهاد

Giesbrecht, M. G. (1972). Evolution of economic society. W.H Freeman and company.

استشهاد بنمط شيكاغو

Giesbrecht, Martin Gerhard. Evolution of Economic Society. San Francisco: W.H Freeman and company, 1972.

MLA استشهاد

Giesbrecht, Martin Gerhard. Evolution of Economic Society. W.H Freeman and company, 1972.