Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.