APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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