APA (7th ed.) Citation

Wilmerding, J., & Wyeth, A. (1987). Andrew Wyeth : the Helga pictures: The Helga pictures. Abrams.

Chicago Style (17th ed.) Citation

Wilmerding, John, and Andrew Wyeth. Andrew Wyeth : The Helga Pictures: The Helga Pictures. New York: Abrams, 1987.

MLA (9th ed.) Citation

Wilmerding, John, and Andrew Wyeth. Andrew Wyeth : The Helga Pictures: The Helga Pictures. Abrams, 1987.

Warning: These citations may not always be 100% accurate.