APA (7th ed.) Citation

Hooft, G. '. (1986). How instantons solve the U(1) problem. North-Holland.

Chicago Style (17th ed.) Citation

Hooft, Gerard 't. How Instantons Solve the U(1) Problem. Amsterdam: North-Holland, 1986.

MLA (9th ed.) Citation

Hooft, Gerard 't. How Instantons Solve the U(1) Problem. North-Holland, 1986.

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