O'Keeffe, G. (1987). Georgia O'Keeffe, art and letters. National Gallery of Art.
芝加哥风格引文O'Keeffe, Georgia. Georgia O'Keeffe, Art and Letters. Washington: National Gallery of Art, 1987.
MLA引文O'Keeffe, Georgia. Georgia O'Keeffe, Art and Letters. National Gallery of Art, 1987.
警告：这些引文格式不一定是100％准确.