APA (7th ed.) Citation

Christensen, E. O. (1948). Popular art in the United States: With illustrations from the index of American design, National Gallery of Art, Washington D.C. Penguin Books.

Chicago Style (17th ed.) Citation

Christensen, Erwin Ottomar. Popular Art in the United States: With Illustrations from the Index of American Design, National Gallery of Art, Washington D.C. London: Penguin Books, 1948.

MLA (9th ed.) Citation

Christensen, Erwin Ottomar. Popular Art in the United States: With Illustrations from the Index of American Design, National Gallery of Art, Washington D.C. Penguin Books, 1948.