This is an oil painting on canvas, entitled 'The Triumph of St. Augustine. The artwork, created by Claudio Coello, was completed in 1664. The piece can be viewed in Madrid in the Museo del Prado.
To reference a painting/drawing/photograph/sculpture the layout in a bibliography is:
Year (in square brackets if available)
Title of the work in italics
Medium (in square brackets).
Institution or collection that houses the work,
Use the drop downs to select an element and complete the reference by placing the elements in the correct order. There may be more elements than you need.