Cita APA (7a ed.)

O'Keeffe, G. (1987). Georgia O'Keeffe, art and letters. National Gallery of Art.

Cita Chicago Style (17a ed.)

O'Keeffe, Georgia. Georgia O'Keeffe, Art and Letters. Washington: National Gallery of Art, 1987.

Cita MLA (9a ed.)

O'Keeffe, Georgia. Georgia O'Keeffe, Art and Letters. National Gallery of Art, 1987.