APA-viite (7. p.)

Porteous, I. R. (1969). Topological geometry (1969). Van Nostrand Reinhold.

Chicago-viite (17. p.)

Porteous, Ian Robertson. Topological Geometry (1969). London: Van Nostrand Reinhold, 1969.

MLA-viite (9. p.)

Porteous, Ian Robertson. Topological Geometry (1969). Van Nostrand Reinhold, 1969.