APA استشهاد

Gwizdz, A. (1966). The state system of the polish people's republic. Polonia publishing house.

استشهاد بنمط شيكاغو

Gwizdz, Andrzej. The State System of the Polish People's Republic. Warsaw: Polonia publishing house, 1966.

MLA استشهاد

Gwizdz, Andrzej. The State System of the Polish People's Republic. Polonia publishing house, 1966.