I teach photo courses, and the thing I tell students is to look at the eyes to see how the image was shot. In this case, there are glasses, so it is even easier to see.
That effect is done with a single softbox slightly to the left of the photgrapher and above the model. Look at the reflections in the glasses. There is only one light source at 11 o'clock in the glasses. If there were reflectos or another light source, you would see the other sources of light in the glasses.
Softboxes wrap the light around a model's face and do not produce harsh shadows when they are basically placed directly facing the model as it was in this image.
I don't know why you would want to create that look, though. When using a single shoftbox, I place it at 45 degrees or more to intentionally create shadows. The images are much more dramatic with the shadows than with a flat front-lit image.
Example of my single softbox approach is attached. Model is Nadia Rio from Atlanta.