Cita APA (7th ed.)

Butterfield, R., Houlsby, G., & Gottardi, G. (1998). Standardized sign conventions and notation for generally loaded foundations (vol 47, pg 1051, 1997).

Cita Chicago (17th ed.)

Butterfield, R., G. Houlsby, i G. Gottardi. Standardized Sign Conventions and Notation for Generally Loaded Foundations (vol 47, Pg 1051, 1997). 1998.

Cita MLA (9th ed.)

Butterfield, R., et al. Standardized Sign Conventions and Notation for Generally Loaded Foundations (vol 47, Pg 1051, 1997). 1998.