Johnson, M. F. (1983). Visual workouts: A collection of art-making problems. Prentice-Hall.
Chicago-viite (17. p.)Johnson, Mary Frisbee. Visual Workouts: A Collection of Art-making Problems. Englewood Cliffs, N.J: Prentice-Hall, 1983.
MLA-viite (9. p.)Johnson, Mary Frisbee. Visual Workouts: A Collection of Art-making Problems. Prentice-Hall, 1983.
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