Helen Frik : It really does matter.

MLA

Frik, Helen. Helen Frik : It Really Does Matter. Amsterdam: Helen Frik, 1996.

APA

Frik, H. (1996). Helen Frik : It really does matter. Amsterdam: Helen Frik.

Chicago

Frik, Helen Helen Frik: It Really Does Matter. Amsterdam: Helen Frik, 1996.