Cita APA (7th ed.)

Roland, C. (1970). Frei Otto: Tension structures. Praeger.

Cita Chicago (17th ed.)

Roland, Conrad. Frei Otto: Tension Structures. Nueva York: Praeger, 1970.

Cita MLA (9th ed.)

Roland, Conrad. Frei Otto: Tension Structures. Praeger, 1970.