APA-viite

Robin, G., & Keith Roberts. (1972). British portrait painters. Encyclopaedia Britannia.

Chicago-tyylinen lähdeviittaus

Robin, Gibson, ja Keith Roberts. British Portrait Painters. London: Encyclopaedia Britannia, 1972.

MLA-viite

Robin, Gibson, ja Keith Roberts. British Portrait Painters. Encyclopaedia Britannia, 1972.