APA

Lupton E., Abbott Miller J. & Herb Lubalin Study Center. (1991). The ABC's of [triangle, square, circle]. New York: The Herb Labalin Study Center of Design and Tipography. The Cooper Union for the Advancement of Science and Art.

Chicago

Lupton Ellen, Abbott Miller J and Herb Lubalin Study Center. 1991. The ABC's of [triangle, square, circle]. New York: The Herb Labalin Study Center of Design and Tipography. The Cooper Union for the Advancement of Science and Art.

Harvard

Lupton E., Abbott Miller J. and Herb Lubalin Study Center. (1991). The ABC's of [triangle, square, circle]. New York: The Herb Labalin Study Center of Design and Tipography. The Cooper Union for the Advancement of Science and Art.

MLA

Lupton Ellen, Abbott Miller J and Herb Lubalin Study Center. The ABC's of [triangle, square, circle]. New York: The Herb Labalin Study Center of Design and Tipography. The Cooper Union for the Advancement of Science and Art. 1991.