APA

Georgacarakos G. N., Smith R. & McGraw-Hill (1968-1995). (1979). Elementary formal logic. New York [i pozostałe]: McGraw-Hill Book Company.

Chicago

Georgacarakos George N, Smith Robin and McGraw-Hill (1968-1995). 1979. Elementary formal logic. New York [i pozostałe]: McGraw-Hill Book Company.

Harvard

Georgacarakos G. N., Smith R. and McGraw-Hill (1968-1995). (1979). Elementary formal logic. New York [i pozostałe]: McGraw-Hill Book Company.

MLA

Georgacarakos George N, Smith Robin and McGraw-Hill (1968-1995). Elementary formal logic. New York [i pozostałe]: McGraw-Hill Book Company. 1979.