Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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