Cita APA (7a ed.)

Hart, F., Henn, W., & Sontag, H. (1974). Structure Acier Batiments a Etages (1a ed.). [s.n.].

Cita Chicago Style (17a ed.)

Hart, F., W. Henn, y H. Sontag. Structure Acier Batiments a Etages. 1a ed. Paris: [s.n.], 1974.

Cita MLA (9a ed.)

Hart, F., et al. Structure Acier Batiments a Etages. 1a ed. [s.n.], 1974.