APA (7th ed.) Citation

Kozak, A. (1977). Unknown portrait by Jan de Herdt.

Chicago Style (17th ed.) Citation

Kozak, Anna. Unknown Portrait by Jan De Herdt. 1977.

MLA (9th ed.) Citation

Kozak, Anna. Unknown Portrait by Jan De Herdt. 1977.

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