APA (7th ed.) Citation

Reise, B. M. (1977). Who, what is 'Sigmar Polke'?

Chicago Style (17th ed.) Citation

Reise, Barbara M. Who, What Is 'Sigmar Polke'? 1977.

MLA (9th ed.) Citation

Reise, Barbara M. Who, What Is 'Sigmar Polke'? 1977.

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