Introduction to projective geometry and modern algebra / by Robert A. Rosenbaum

Personality projection in the drawing of the human figure : (a method of personality investigation) /​ by Karen Machover.

Schaum's outline series theory and problems of projective geometry

Bijeksi yang mempertahankan garis proyektif pada ruang proyektif real Pn = Bijection that preserves projective lines in real projective space Pn

Mekanisme proyeksi : pada orang normal dan abnormal