APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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