Baetjer 1999, p. 42. Baetjer, Katharine (Summer 1999). "British Portraits: In the Metropolitan Museum of Art". The Metropolitan Museum of Art Bulletin. New Series. 57 (1). The Metropolitan Museum of Art: 5–72. doi:10.2307/3258857. JSTOR3258857.
Baetjer 1999, p. 43. Baetjer, Katharine (Summer 1999). "British Portraits: In the Metropolitan Museum of Art". The Metropolitan Museum of Art Bulletin. New Series. 57 (1). The Metropolitan Museum of Art: 5–72. doi:10.2307/3258857. JSTOR3258857.
Baetjer 1999, p. 42. Baetjer, Katharine (Summer 1999). "British Portraits: In the Metropolitan Museum of Art". The Metropolitan Museum of Art Bulletin. New Series. 57 (1). The Metropolitan Museum of Art: 5–72. doi:10.2307/3258857. JSTOR3258857.
Baetjer 1999, p. 43. Baetjer, Katharine (Summer 1999). "British Portraits: In the Metropolitan Museum of Art". The Metropolitan Museum of Art Bulletin. New Series. 57 (1). The Metropolitan Museum of Art: 5–72. doi:10.2307/3258857. JSTOR3258857.