APA (7e ed.) Bronvermelding

Hellers, B. G. (1973). Columns with and without tensile strength: An extension of theories used for the comparison of deflections, rotations, stresses and stability. National Swedish Institute for Building Research.

Chicago (17e ed.) Bronvermelding

Hellers, Bo Göran. Columns with and Without Tensile Strength: An Extension of Theories Used for the Comparison of Deflections, Rotations, Stresses and Stability. Stockholm: National Swedish Institute for Building Research, 1973.

MLA (8e ed.) Bronvermelding

Hellers, Bo Göran. Columns with and Without Tensile Strength: An Extension of Theories Used for the Comparison of Deflections, Rotations, Stresses and Stability. National Swedish Institute for Building Research, 1973.