APA

Hackstaff L. H., . (1966). Systems of logic. Dordrecht: Reidel.

Chicago

Hackstaff L H, . 1966. Systems of logic. Dordrecht: Reidel.

Harvard

Hackstaff L. H., . (1966). Systems of logic. Dordrecht: Reidel.

MLA

Hackstaff L H, . Systems of logic. Dordrecht: Reidel. 1966.