APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Hackstaff, Lawrence H. Systems of Formal Logic. Dordrecht: Reidel, 1966.

MLA (9th ed.) Citation

Hackstaff, Lawrence H. Systems of Formal Logic. Reidel, 1966.

Warning: These citations may not always be 100% accurate.