Cita APA (7a ed.)

Cook, W. W. Spanish paintings in the National Gallery of Art. [s.n.].

Cita Chicago Style (17a ed.)

Cook, Walter W.S. Spanish Paintings in the National Gallery of Art. [s.l.]: [s.n.].

Cita MLA (9a ed.)

Cook, Walter W.S. Spanish Paintings in the National Gallery of Art. [s.n.].