Richmond, L. (1966). From the Sketch to the finished picture oil painting. Sir Isaac Pitman & Sons Ltd.
Chicago-viite (17. p.)Richmond, Leonard. From the Sketch to the Finished Picture Oil Painting. Sir Isaac Pitman & Sons Ltd, 1966.
MLA-viite (8. p.)Richmond, Leonard. From the Sketch to the Finished Picture Oil Painting. Sir Isaac Pitman & Sons Ltd, 1966.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.