APA (7th ed.) Citation

Haag, R. (1955). On quantum field theories. Munksgaard.

Chicago Style (17th ed.) Citation

Haag, R. On Quantum Field Theories. København: Munksgaard, 1955.

MLA (9th ed.) Citation

Haag, R. On Quantum Field Theories. Munksgaard, 1955.

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